diff --git a/spring-test/spring-test.gradle b/spring-test/spring-test.gradle
index f46320cf9e..d1e81279ba 100644
--- a/spring-test/spring-test.gradle
+++ b/spring-test/spring-test.gradle
@@ -53,6 +53,8 @@ dependencies {
 	optional("org.jetbrains.kotlin:kotlin-reflect:${kotlinVersion}")
 	optional("org.jetbrains.kotlin:kotlin-stdlib:${kotlinVersion}")
 	optional("io.projectreactor:reactor-test")
+	optional("org.jetbrains.kotlinx:kotlinx-coroutines-core:${coroutinesVersion}")
+	optional("org.jetbrains.kotlinx:kotlinx-coroutines-reactor:${coroutinesVersion}")
 	testCompile(project(":spring-context-support"))
 	testCompile(project(":spring-oxm"))
 	testCompile("javax.annotation:javax.annotation-api:1.3.2")
diff --git a/spring-test/src/main/java/org/springframework/test/web/reactive/server/DefaultWebTestClient.java b/spring-test/src/main/java/org/springframework/test/web/reactive/server/DefaultWebTestClient.java
index a382181e42..3d03e6e5ff 100644
--- a/spring-test/src/main/java/org/springframework/test/web/reactive/server/DefaultWebTestClient.java
+++ b/spring-test/src/main/java/org/springframework/test/web/reactive/server/DefaultWebTestClient.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -261,8 +261,20 @@ class DefaultWebTestClient implements WebTestClient {
 		}
 
 		@Override
-		public RequestHeadersSpec<?> body(BodyInserter<?, ? super ClientHttpRequest> inserter) {
-			this.bodySpec.body(inserter);
+		public RequestHeadersSpec<?> body(Object body) {
+			this.bodySpec.body(body);
+			return this;
+		}
+
+		@Override
+		public RequestHeadersSpec<?> body(Object producer, Class<?> elementClass) {
+			this.bodySpec.body(producer, elementClass);
+			return this;
+		}
+
+		@Override
+		public RequestHeadersSpec<?> body(Object producer, ParameterizedTypeReference<?> elementType) {
+			this.bodySpec.body(producer, elementType);
 			return this;
 		}
 
@@ -273,11 +285,23 @@ class DefaultWebTestClient implements WebTestClient {
 		}
 
 		@Override
-		public RequestHeadersSpec<?> syncBody(Object body) {
-			this.bodySpec.syncBody(body);
+		public <T, S extends Publisher<T>> RequestHeadersSpec<?> body(S publisher, ParameterizedTypeReference<T> elementType) {
+			this.bodySpec.body(publisher, elementType);
 			return this;
 		}
 
+		@Override
+		public RequestHeadersSpec<?> body(BodyInserter<?, ? super ClientHttpRequest> inserter) {
+			this.bodySpec.body(inserter);
+			return this;
+		}
+
+		@Override
+		@Deprecated
+		public RequestHeadersSpec<?> syncBody(Object body) {
+			return body(body);
+		}
+
 		@Override
 		public ResponseSpec exchange() {
 			ClientResponse clientResponse = this.bodySpec.exchange().block(getTimeout());
diff --git a/spring-test/src/main/java/org/springframework/test/web/reactive/server/WebTestClient.java b/spring-test/src/main/java/org/springframework/test/web/reactive/server/WebTestClient.java
index cc2e8ab96f..9180920bcf 100644
--- a/spring-test/src/main/java/org/springframework/test/web/reactive/server/WebTestClient.java
+++ b/spring-test/src/main/java/org/springframework/test/web/reactive/server/WebTestClient.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,6 +30,7 @@ import org.reactivestreams.Publisher;
 
 import org.springframework.context.ApplicationContext;
 import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.core.ReactiveAdapterRegistry;
 import org.springframework.format.FormatterRegistry;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
@@ -625,26 +626,7 @@ public interface WebTestClient {
 		RequestBodySpec contentType(MediaType contentType);
 
 		/**
-		 * Set the body of the request to the given {@code BodyInserter}.
-		 * @param inserter the inserter
-		 * @return spec for decoding the response
-		 * @see org.springframework.web.reactive.function.BodyInserters
-		 */
-		RequestHeadersSpec<?> body(BodyInserter<?, ? super ClientHttpRequest> inserter);
-
-		/**
-		 * Set the body of the request to the given asynchronous {@code Publisher}.
-		 * @param publisher the request body data
-		 * @param elementClass the class of elements contained in the publisher
-		 * @param <T> the type of the elements contained in the publisher
-		 * @param <S> the type of the {@code Publisher}
-		 * @return spec for decoding the response
-		 */
-		<T, S extends Publisher<T>> RequestHeadersSpec<?> body(S publisher, Class<T> elementClass);
-
-		/**
-		 * Set the body of the request to the given synchronous {@code Object} and
-		 * perform the request.
+		 * Set the body of the request to the given {@code Object} and perform the request.
 		 * <p>This method is a convenient shortcut for:
 		 * <pre class="code">
 		 * .body(BodyInserters.fromObject(object))
@@ -657,8 +639,83 @@ public interface WebTestClient {
 		 * part with body and headers. The {@code MultiValueMap} can be built
 		 * conveniently using
 		 * @param body the {@code Object} to write to the request
-		 * @return a {@code Mono} with the response
+		 * @return spec for decoding the response
+		 * @since 5.2
 		 */
+		RequestHeadersSpec<?> body(Object body);
+
+		/**
+		 * Set the body of the request to the given producer.
+		 * @param producer the producer to write to the request. This must be a
+		 * {@link Publisher} or another producer adaptable to a
+		 * {@code Publisher} via {@link ReactiveAdapterRegistry}
+		 * @param elementClass the class of elements contained in the producer
+		 * @return spec for decoding the response
+		 * @since 5.2
+		 */
+		RequestHeadersSpec<?> body(Object producer, Class<?> elementClass);
+
+		/**
+		 * Set the body of the request to the given producer.
+		 * @param producer the producer to write to the request. This must be a
+		 * {@link Publisher} or another producer adaptable to a
+		 * {@code Publisher} via {@link ReactiveAdapterRegistry}
+		 * @param elementType the type reference of elements contained in the producer
+		 * @return spec for decoding the response
+		 * @since 5.2
+		 */
+		RequestHeadersSpec<?> body(Object producer, ParameterizedTypeReference<?> elementType);
+
+		/**
+		 * Set the body of the request to the given asynchronous {@code Publisher}.
+		 * @param publisher the request body data
+		 * @param elementClass the class of elements contained in the publisher
+		 * @param <T> the type of the elements contained in the publisher
+		 * @param <S> the type of the {@code Publisher}
+		 * @return spec for decoding the response
+		 */
+		<T, S extends Publisher<T>> RequestHeadersSpec<?> body(S publisher, Class<T> elementClass);
+
+		/**
+		 * Set the body of the request to the given asynchronous {@code Publisher}.
+		 * @param publisher the request body data
+		 * @param elementType the type reference of elements contained in the publisher
+		 * @param <T> the type of the elements contained in the publisher
+		 * @param <S> the type of the {@code Publisher}
+		 * @return spec for decoding the response
+		 * @since 5.2
+		 */
+		<T, S extends Publisher<T>> RequestHeadersSpec<?> body(S publisher, ParameterizedTypeReference<T> elementType);
+
+		/**
+		 * Set the body of the request to the given {@code BodyInserter}.
+		 * @param inserter the inserter
+		 * @return spec for decoding the response
+		 * @see org.springframework.web.reactive.function.BodyInserters
+		 */
+		RequestHeadersSpec<?> body(BodyInserter<?, ? super ClientHttpRequest> inserter);
+
+		/**
+		 * Set the body of the request to the given {@code Object} and perform the request.
+		 * <p>This method is a convenient shortcut for:
+		 * <pre class="code">
+		 * .body(BodyInserters.fromObject(object))
+		 * </pre>
+		 * <p>The body can be a
+		 * {@link org.springframework.util.MultiValueMap MultiValueMap} to create
+		 * a multipart request. The values in the {@code MultiValueMap} can be
+		 * any Object representing the body of the part, or an
+		 * {@link org.springframework.http.HttpEntity HttpEntity} representing a
+		 * part with body and headers. The {@code MultiValueMap} can be built
+		 * conveniently using
+		 * @param body the {@code Object} to write to the request
+		 * @return spec for decoding the response
+		 * @throws IllegalArgumentException if {@code body} is a {@link Publisher} or an
+		 * instance of a type supported by {@link ReactiveAdapterRegistry#getSharedInstance()},
+		 * for which {@link #body(Publisher, Class)} or {@link #body(Object, Class)} should be used.
+		 * @deprecated as of Spring Framework 5.2 in favor of {@link #body(Object)}
+		 */
+		@Deprecated
 		RequestHeadersSpec<?> syncBody(Object body);
 	}
 
diff --git a/spring-test/src/main/kotlin/org/springframework/test/web/reactive/server/WebTestClientExtensions.kt b/spring-test/src/main/kotlin/org/springframework/test/web/reactive/server/WebTestClientExtensions.kt
index d0c09a8cf3..e70ddee89c 100644
--- a/spring-test/src/main/kotlin/org/springframework/test/web/reactive/server/WebTestClientExtensions.kt
+++ b/spring-test/src/main/kotlin/org/springframework/test/web/reactive/server/WebTestClientExtensions.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,10 @@
 
 package org.springframework.test.web.reactive.server
 
+import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.flow.Flow
 import org.reactivestreams.Publisher
+import org.springframework.core.ParameterizedTypeReference
 import org.springframework.test.util.AssertionErrors.assertEquals
 import org.springframework.test.web.reactive.server.WebTestClient.*
 
@@ -27,8 +30,49 @@ import org.springframework.test.web.reactive.server.WebTestClient.*
  * @author Sebastien Deleuze
  * @since 5.0
  */
+@Deprecated("Use 'bodyWithType' instead.", replaceWith = ReplaceWith("bodyWithType(publisher)"))
+@Suppress("EXTENSION_SHADOWED_BY_MEMBER")
 inline fun <reified T : Any, S : Publisher<T>> RequestBodySpec.body(publisher: S): RequestHeadersSpec<*>
-		= body(publisher, T::class.java)
+		= body(publisher, object : ParameterizedTypeReference<T>() {})
+
+/**
+ * Extension for [RequestBodySpec.body] providing a `bodyWithType<T>(Any)` variant
+ * leveraging Kotlin reified type parameters. This extension is not subject to type
+ * erasure and retains actual generic type arguments.
+ * @param producer the producer to write to the request. This must be a
+ * [Publisher] or another producer adaptable to a
+ * [Publisher] via [org.springframework.core.ReactiveAdapterRegistry]
+ * @param <T> the type of the elements contained in the producer
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+inline fun <reified T : Any> RequestBodySpec.bodyWithType(producer: Any): RequestHeadersSpec<*>
+		= body(producer, object : ParameterizedTypeReference<T>() {})
+
+/**
+ * Extension for [RequestBodySpec.body] providing a `bodyWithType(Publisher<T>)` variant
+ * leveraging Kotlin reified type parameters. This extension is not subject to type
+ * erasure and retains actual generic type arguments.
+ * @param publisher the [Publisher] to write to the request
+ * @param <T> the type of the elements contained in the publisher
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+inline fun <reified T : Any> RequestBodySpec.bodyWithType(publisher: Publisher<T>): RequestHeadersSpec<*> =
+		body(publisher, object : ParameterizedTypeReference<T>() {})
+
+/**
+ * Extension for [RequestBodySpec.body] providing a `bodyWithType(Flow<T>)` variant
+ * leveraging Kotlin reified type parameters. This extension is not subject to type
+ * erasure and retains actual generic type arguments.
+ * @param flow the [Flow] to write to the request
+ * @param <T> the type of the elements contained in the publisher
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+@FlowPreview
+inline fun <reified T : Any> RequestBodySpec.bodyWithType(flow: Flow<T>): RequestHeadersSpec<*> =
+		body(flow, object : ParameterizedTypeReference<T>() {})
 
 /**
  * Extension for [ResponseSpec.expectBody] providing an `expectBody<Foo>()` variant and
@@ -44,13 +88,11 @@ inline fun <reified B : Any> ResponseSpec.expectBody(): KotlinBodySpec<B> =
 			object : KotlinBodySpec<B> {
 
 				override fun isEqualTo(expected: B): KotlinBodySpec<B> = it
-							.assertWithDiagnostics({ assertEquals("Response body", expected, it.responseBody) })
-							.let { this }
+						.assertWithDiagnostics { assertEquals("Response body", expected, it.responseBody) }
+						.let { this }
 
 				override fun consumeWith(consumer: (EntityExchangeResult<B>) -> Unit): KotlinBodySpec<B> =
-					it
-							.assertWithDiagnostics({ consumer.invoke(it) })
-							.let { this }
+					it.assertWithDiagnostics { consumer.invoke(it) }.let { this }
 
 				override fun returnResult(): EntityExchangeResult<B> = it
 			}
@@ -88,7 +130,7 @@ interface KotlinBodySpec<B> {
  * @since 5.0
  */
 inline fun <reified E : Any> ResponseSpec.expectBodyList(): ListBodySpec<E> =
-		expectBodyList(E::class.java)
+		expectBodyList(object : ParameterizedTypeReference<E>() {})
 
 /**
  * Extension for [ResponseSpec.returnResult] providing a `returnResult<Foo>()` variant.
@@ -98,4 +140,4 @@ inline fun <reified E : Any> ResponseSpec.expectBodyList(): ListBodySpec<E> =
  */
 @Suppress("EXTENSION_SHADOWED_BY_MEMBER")
 inline fun <reified T : Any> ResponseSpec.returnResult(): FluxExchangeResult<T> =
-		returnResult(T::class.java)
+		returnResult(object : ParameterizedTypeReference<T>() {})
diff --git a/spring-test/src/test/java/org/springframework/test/web/reactive/server/ApplicationContextSpecTests.java b/spring-test/src/test/java/org/springframework/test/web/reactive/server/ApplicationContextSpecTests.java
index 20dcdd649c..8704ff3266 100644
--- a/spring-test/src/test/java/org/springframework/test/web/reactive/server/ApplicationContextSpecTests.java
+++ b/spring-test/src/test/java/org/springframework/test/web/reactive/server/ApplicationContextSpecTests.java
@@ -61,7 +61,7 @@ public class ApplicationContextSpecTests {
 					.GET("/sessionClassName", request ->
 							request.session().flatMap(session -> {
 								String className = session.getClass().getSimpleName();
-								return ServerResponse.ok().syncBody(className);
+								return ServerResponse.ok().body(className);
 							}))
 					.build();
 		}
diff --git a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ErrorTests.java b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ErrorTests.java
index 83d61e8de4..c85ff0b1af 100644
--- a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ErrorTests.java
+++ b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ErrorTests.java
@@ -63,7 +63,7 @@ public class ErrorTests {
 		EntityExchangeResult<Void> result = this.client.post()
 				.uri("/post")
 				.contentType(MediaType.APPLICATION_JSON)
-				.syncBody(new Person("Dan"))
+				.body(new Person("Dan"))
 				.exchange()
 				.expectStatus().isBadRequest()
 				.expectBody().isEmpty();
diff --git a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/JsonContentTests.java b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/JsonContentTests.java
index 0d0f9c7a65..6725a0a267 100644
--- a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/JsonContentTests.java
+++ b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/JsonContentTests.java
@@ -82,7 +82,7 @@ public class JsonContentTests {
 	public void postJsonContent() {
 		this.client.post().uri("/persons")
 				.contentType(MediaType.APPLICATION_JSON)
-				.syncBody("{\"name\":\"John\"}")
+				.body("{\"name\":\"John\"}")
 				.exchange()
 				.expectStatus().isCreated()
 				.expectBody().isEmpty();
diff --git a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ResponseEntityTests.java b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ResponseEntityTests.java
index 7a1361cd5a..dda30498fb 100644
--- a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ResponseEntityTests.java
+++ b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ResponseEntityTests.java
@@ -145,7 +145,7 @@ public class ResponseEntityTests {
 	@Test
 	public void postEntity() {
 		this.client.post()
-				.syncBody(new Person("John"))
+				.body(new Person("John"))
 				.exchange()
 				.expectStatus().isCreated()
 				.expectHeader().valueEquals("location", "/persons/John")
diff --git a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/XmlContentTests.java b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/XmlContentTests.java
index faf18f6c6a..08c23635e5 100644
--- a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/XmlContentTests.java
+++ b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/XmlContentTests.java
@@ -116,7 +116,7 @@ public class XmlContentTests {
 
 		this.client.post().uri("/persons")
 				.contentType(MediaType.APPLICATION_XML)
-				.syncBody(content)
+				.body(content)
 				.exchange()
 				.expectStatus().isCreated()
 				.expectHeader().valueEquals(HttpHeaders.LOCATION, "/persons/John")
diff --git a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/bind/HttpServerTests.java b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/bind/HttpServerTests.java
index 773a6110e0..752ffca7c9 100644
--- a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/bind/HttpServerTests.java
+++ b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/bind/HttpServerTests.java
@@ -45,7 +45,7 @@ public class HttpServerTests {
 	@Before
 	public void start() throws Exception {
 		HttpHandler httpHandler = RouterFunctions.toHttpHandler(
-				route(GET("/test"), request -> ServerResponse.ok().syncBody("It works!")));
+				route(GET("/test"), request -> ServerResponse.ok().body("It works!")));
 
 		this.server = new ReactorHttpServer();
 		this.server.setHandler(httpHandler);
diff --git a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/bind/RouterFunctionTests.java b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/bind/RouterFunctionTests.java
index aebeaf2c15..710ad2355b 100644
--- a/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/bind/RouterFunctionTests.java
+++ b/spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/bind/RouterFunctionTests.java
@@ -41,7 +41,7 @@ public class RouterFunctionTests {
 	public void setUp() throws Exception {
 
 		RouterFunction<?> route = route(GET("/test"), request ->
-				ServerResponse.ok().syncBody("It works!"));
+				ServerResponse.ok().body("It works!"));
 
 		this.testClient = WebTestClient.bindToRouterFunction(route).build();
 	}
diff --git a/spring-test/src/test/kotlin/org/springframework/test/web/reactive/server/WebTestClientExtensionsTests.kt b/spring-test/src/test/kotlin/org/springframework/test/web/reactive/server/WebTestClientExtensionsTests.kt
index 277c855246..6432b95418 100644
--- a/spring-test/src/test/kotlin/org/springframework/test/web/reactive/server/WebTestClientExtensionsTests.kt
+++ b/spring-test/src/test/kotlin/org/springframework/test/web/reactive/server/WebTestClientExtensionsTests.kt
@@ -18,10 +18,14 @@ package org.springframework.test.web.reactive.server
 
 import io.mockk.mockk
 import io.mockk.verify
+import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.flow.Flow
 import org.junit.Assert.assertEquals
 import org.junit.Test
 import org.reactivestreams.Publisher
+import org.springframework.core.ParameterizedTypeReference
 import org.springframework.web.reactive.function.server.router
+import java.util.concurrent.CompletableFuture
 
 /**
  * Mock object based tests for [WebTestClient] Kotlin extensions
@@ -30,16 +34,31 @@ import org.springframework.web.reactive.function.server.router
  */
 class WebTestClientExtensionsTests {
 
-	val requestBodySpec = mockk<WebTestClient.RequestBodySpec>(relaxed = true)
+	private val requestBodySpec = mockk<WebTestClient.RequestBodySpec>(relaxed = true)
 
-	val responseSpec = mockk<WebTestClient.ResponseSpec>(relaxed = true)
+	private val responseSpec = mockk<WebTestClient.ResponseSpec>(relaxed = true)
 
 
 	@Test
-	fun `RequestBodySpec#body with Publisher and reified type parameters`() {
+	fun `RequestBodySpec#bodyWithType with Publisher and reified type parameters`() {
 		val body = mockk<Publisher<Foo>>()
-		requestBodySpec.body(body)
-		verify { requestBodySpec.body(body, Foo::class.java) }
+		requestBodySpec.bodyWithType(body)
+		verify { requestBodySpec.body(body, object : ParameterizedTypeReference<Foo>() {}) }
+	}
+
+	@Test
+	@FlowPreview
+	fun `RequestBodySpec#bodyWithType with Flow and reified type parameters`() {
+		val body = mockk<Flow<Foo>>()
+		requestBodySpec.bodyWithType(body)
+		verify { requestBodySpec.body(body, object : ParameterizedTypeReference<Foo>() {}) }
+	}
+
+	@Test
+	fun `RequestBodySpec#bodyWithType with CompletableFuture and reified type parameters`() {
+		val body = mockk<CompletableFuture<Foo>>()
+		requestBodySpec.bodyWithType<Foo>(body)
+		verify { requestBodySpec.body(body, object : ParameterizedTypeReference<Foo>() {}) }
 	}
 
 	@Test
@@ -51,7 +70,7 @@ class WebTestClientExtensionsTests {
 	@Test
 	fun `KotlinBodySpec#isEqualTo`() {
 		WebTestClient
-				.bindToRouterFunction( router { GET("/") { ok().syncBody("foo") } } )
+				.bindToRouterFunction( router { GET("/") { ok().body("foo") } } )
 				.build()
 				.get().uri("/").exchange().expectBody<String>().isEqualTo("foo")
 	}
@@ -59,7 +78,7 @@ class WebTestClientExtensionsTests {
 	@Test
 	fun `KotlinBodySpec#consumeWith`() {
 		WebTestClient
-				.bindToRouterFunction( router { GET("/") { ok().syncBody("foo") } } )
+				.bindToRouterFunction( router { GET("/") { ok().body("foo") } } )
 				.build()
 				.get().uri("/").exchange().expectBody<String>().consumeWith { assertEquals("foo", it.responseBody) }
 	}
@@ -67,7 +86,7 @@ class WebTestClientExtensionsTests {
 	@Test
 	fun `KotlinBodySpec#returnResult`() {
 		WebTestClient
-				.bindToRouterFunction( router { GET("/") { ok().syncBody("foo") } } )
+				.bindToRouterFunction( router { GET("/") { ok().body("foo") } } )
 				.build()
 				.get().uri("/").exchange().expectBody<String>().returnResult().apply { assertEquals("foo", responseBody) }
 	}
@@ -75,13 +94,13 @@ class WebTestClientExtensionsTests {
 	@Test
 	fun `ResponseSpec#expectBodyList with reified type parameters`() {
 		responseSpec.expectBodyList<Foo>()
-		verify { responseSpec.expectBodyList(Foo::class.java) }
+		verify { responseSpec.expectBodyList(object : ParameterizedTypeReference<Foo>() {}) }
 	}
 
 	@Test
 	fun `ResponseSpec#returnResult with reified type parameters`() {
 		responseSpec.returnResult<Foo>()
-		verify { responseSpec.returnResult(Foo::class.java) }
+		verify { responseSpec.returnResult(object : ParameterizedTypeReference<Foo>() {}) }
 	}
 
 	class Foo
diff --git a/spring-web/src/main/java/org/springframework/http/client/MultipartBodyBuilder.java b/spring-web/src/main/java/org/springframework/http/client/MultipartBodyBuilder.java
index 8982cc4f97..d63f65f142 100644
--- a/spring-web/src/main/java/org/springframework/http/client/MultipartBodyBuilder.java
+++ b/spring-web/src/main/java/org/springframework/http/client/MultipartBodyBuilder.java
@@ -41,7 +41,7 @@ import org.springframework.util.MultiValueMap;
 /**
  * Builder for the body of a multipart request, producing
  * {@code MultiValueMap<String, HttpEntity>}, which can be provided to the
- * {@code WebClient} through the {@code syncBody} method.
+ * {@code WebClient} through the {@code body} method.
  *
  * Examples:
  * <pre class="code">
@@ -67,7 +67,7 @@ import org.springframework.util.MultiValueMap;
  *
  * Mono&lt;Void&gt; result = webClient.post()
  *     .uri("...")
- *     .syncBody(multipartBody)
+ *     .body(multipartBody)
  *     .retrieve()
  *     .bodyToMono(Void.class)
  * </pre>
diff --git a/spring-webflux/src/main/java/org/springframework/web/reactive/function/BodyInserters.java b/spring-webflux/src/main/java/org/springframework/web/reactive/function/BodyInserters.java
index 72442eaf78..e869dc55c2 100644
--- a/spring-webflux/src/main/java/org/springframework/web/reactive/function/BodyInserters.java
+++ b/spring-webflux/src/main/java/org/springframework/web/reactive/function/BodyInserters.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,8 @@ import org.reactivestreams.Publisher;
 import reactor.core.publisher.Mono;
 
 import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.core.ReactiveAdapter;
+import org.springframework.core.ReactiveAdapterRegistry;
 import org.springframework.core.ResolvableType;
 import org.springframework.core.io.Resource;
 import org.springframework.core.io.buffer.DataBuffer;
@@ -44,6 +46,7 @@ import org.springframework.util.MultiValueMap;
  *
  * @author Arjen Poutsma
  * @author Rossen Stoyanchev
+ * @author Sebastien Deleuze
  * @since 5.0
  */
 public abstract class BodyInserters {
@@ -61,6 +64,8 @@ public abstract class BodyInserters {
 	private static final BodyInserter<Void, ReactiveHttpOutputMessage> EMPTY_INSERTER =
 			(response, context) -> response.setComplete();
 
+	private static final ReactiveAdapterRegistry registry = ReactiveAdapterRegistry.getSharedInstance();
+
 
 	/**
 	 * Inserter that does not write.
@@ -73,16 +78,68 @@ public abstract class BodyInserters {
 
 	/**
 	 * Inserter to write the given object.
-	 * <p>Alternatively, consider using the {@code syncBody(Object)} shortcuts on
+	 * <p>Alternatively, consider using the {@code body(Object)} shortcuts on
 	 * {@link org.springframework.web.reactive.function.client.WebClient WebClient} and
 	 * {@link org.springframework.web.reactive.function.server.ServerResponse ServerResponse}.
 	 * @param body the body to write to the response
 	 * @param <T> the type of the body
 	 * @return the inserter to write a single object
+	 * @throws IllegalArgumentException if {@code body} is a {@link Publisher} or an
+	 * instance of a type supported by {@link ReactiveAdapterRegistry#getSharedInstance()},
+	 * for which {@link #fromPublisher(Publisher, Class)} or
+	 * {@link #fromProducer(Object, Class)} should be used.
+	 * @see #fromPublisher(Publisher, Class)
+	 * @see #fromProducer(Object, Class)
 	 */
 	public static <T> BodyInserter<T, ReactiveHttpOutputMessage> fromObject(T body) {
+		Assert.notNull(body, "Body must not be null");
+		Assert.isNull(registry.getAdapter(body.getClass()), "'body' should be an object, for reactive types use a variant specifying a publisher/producer and its related element type");
 		return (message, context) ->
-				writeWithMessageWriters(message, context, Mono.just(body), ResolvableType.forInstance(body));
+				writeWithMessageWriters(message, context, Mono.just(body), ResolvableType.forInstance(body), null);
+	}
+
+	/**
+	 * Inserter to write the given producer of value(s) which must be a {@link Publisher}
+	 * or another producer adaptable to a {@code Publisher} via
+	 * {@link ReactiveAdapterRegistry}.
+	 * <p>Alternatively, consider using the {@code body} shortcuts on
+	 * {@link org.springframework.web.reactive.function.client.WebClient WebClient} and
+	 * {@link org.springframework.web.reactive.function.server.ServerResponse ServerResponse}.
+	 * @param <T> the type of the body
+	 * @param producer the source of body value(s).
+	 * @param elementClass the type of values to be produced
+	 * @return the inserter to write a producer
+	 * @since 5.2
+	 */
+	public static <T> BodyInserter<T, ReactiveHttpOutputMessage> fromProducer(T producer, Class<?> elementClass) {
+		Assert.notNull(producer, "'producer' must not be null");
+		Assert.notNull(elementClass, "'elementClass' must not be null");
+		ReactiveAdapter adapter = ReactiveAdapterRegistry.getSharedInstance().getAdapter(producer.getClass());
+		Assert.notNull(adapter, "'producer' type is unknown to ReactiveAdapterRegistry");
+		return (message, context) ->
+				writeWithMessageWriters(message, context, producer, ResolvableType.forClass(elementClass), adapter);
+	}
+
+	/**
+	 * Inserter to write the given producer of value(s) which must be a {@link Publisher}
+	 * or another producer adaptable to a {@code Publisher} via
+	 * {@link ReactiveAdapterRegistry}.
+	 * <p>Alternatively, consider using the {@code body} shortcuts on
+	 * {@link org.springframework.web.reactive.function.client.WebClient WebClient} and
+	 * {@link org.springframework.web.reactive.function.server.ServerResponse ServerResponse}.
+	 * @param <T> the type of the body
+	 * @param producer the source of body value(s).
+	 * @param elementType the type of values to be produced
+	 * @return the inserter to write a producer
+	 * @since 5.2
+	 */
+	public static <T> BodyInserter<T, ReactiveHttpOutputMessage> fromProducer(T producer, ParameterizedTypeReference<?> elementType) {
+		Assert.notNull(producer, "'producer' must not be null");
+		Assert.notNull(elementType, "'elementType' must not be null");
+		ReactiveAdapter adapter = ReactiveAdapterRegistry.getSharedInstance().getAdapter(producer.getClass());
+		Assert.notNull(adapter, "'producer' type is unknown to ReactiveAdapterRegistry");
+		return (message, context) ->
+				writeWithMessageWriters(message, context, producer, ResolvableType.forType(elementType), adapter);
 	}
 
 	/**
@@ -102,7 +159,7 @@ public abstract class BodyInserters {
 		Assert.notNull(publisher, "Publisher must not be null");
 		Assert.notNull(elementClass, "Element Class must not be null");
 		return (message, context) ->
-				writeWithMessageWriters(message, context, publisher, ResolvableType.forClass(elementClass));
+				writeWithMessageWriters(message, context, publisher, ResolvableType.forClass(elementClass), null);
 	}
 
 	/**
@@ -122,7 +179,7 @@ public abstract class BodyInserters {
 		Assert.notNull(publisher, "Publisher must not be null");
 		Assert.notNull(typeReference, "ParameterizedTypeReference must not be null");
 		return (message, context) ->
-				writeWithMessageWriters(message, context, publisher, ResolvableType.forType(typeReference.getType()));
+				writeWithMessageWriters(message, context, publisher, ResolvableType.forType(typeReference.getType()), null);
 	}
 
 	/**
@@ -145,8 +202,8 @@ public abstract class BodyInserters {
 	/**
 	 * Inserter to write the given {@code ServerSentEvent} publisher.
 	 * <p>Alternatively, you can provide event data objects via
-	 * {@link #fromPublisher(Publisher, Class)}, and set the "Content-Type" to
-	 * {@link MediaType#TEXT_EVENT_STREAM text/event-stream}.
+	 * {@link #fromPublisher(Publisher, Class)} or {@link #fromProducer(Object, Class)},
+	 * and set the "Content-Type" to {@link MediaType#TEXT_EVENT_STREAM text/event-stream}.
 	 * @param eventsPublisher the {@code ServerSentEvent} publisher to write to the response body
 	 * @param <T> the type of the data elements in the {@link ServerSentEvent}
 	 * @return the inserter to write a {@code ServerSentEvent} publisher
@@ -169,7 +226,7 @@ public abstract class BodyInserters {
 	 * Return a {@link FormInserter} to write the given {@code MultiValueMap}
 	 * as URL-encoded form data. The returned inserter allows for additional
 	 * entries to be added via {@link FormInserter#with(String, Object)}.
-	 * <p>Note that you can also use the {@code syncBody(Object)} method in the
+	 * <p>Note that you can also use the {@code body(Object)} method in the
 	 * request builders of both the {@code WebClient} and {@code WebTestClient}.
 	 * In that case the setting of the request content type is also not required,
 	 * just be sure the map contains String values only or otherwise it would be
@@ -201,7 +258,7 @@ public abstract class BodyInserters {
 	 * Object or an {@link HttpEntity}.
 	 * <p>Note that you can also build the multipart data externally with
 	 * {@link MultipartBodyBuilder}, and pass the resulting map directly to the
-	 * {@code syncBody(Object)} shortcut method in {@code WebClient}.
+	 * {@code body(Object)} shortcut method in {@code WebClient}.
 	 * @param multipartData the form data to write to the output message
 	 * @return the inserter that allows adding more parts
 	 * @see MultipartBodyBuilder
@@ -217,7 +274,7 @@ public abstract class BodyInserters {
 	 * {@link HttpEntity}.
 	 * <p>Note that you can also build the multipart data externally with
 	 * {@link MultipartBodyBuilder}, and pass the resulting map directly to the
-	 * {@code syncBody(Object)} shortcut method in {@code WebClient}.
+	 * {@code body(Object)} shortcut method in {@code WebClient}.
 	 * @param name the part name
 	 * @param value the part value, an Object or {@code HttpEntity}
 	 * @return the inserter that allows adding more parts
@@ -233,7 +290,7 @@ public abstract class BodyInserters {
 	 * as multipart data.
 	 * <p>Note that you can also build the multipart data externally with
 	 * {@link MultipartBodyBuilder}, and pass the resulting map directly to the
-	 * {@code syncBody(Object)} shortcut method in {@code WebClient}.
+	 * {@code body(Object)} shortcut method in {@code WebClient}.
 	 * @param name the part name
 	 * @param publisher the publisher that forms the part value
 	 * @param elementClass the class contained in the {@code publisher}
@@ -251,7 +308,7 @@ public abstract class BodyInserters {
 	 * allows specifying generic type information.
 	 * <p>Note that you can also build the multipart data externally with
 	 * {@link MultipartBodyBuilder}, and pass the resulting map directly to the
-	 * {@code syncBody(Object)} shortcut method in {@code WebClient}.
+	 * {@code body(Object)} shortcut method in {@code WebClient}.
 	 * @param name the part name
 	 * @param publisher the publisher that forms the part value
 	 * @param typeReference the type contained in the {@code publisher}
@@ -278,15 +335,25 @@ public abstract class BodyInserters {
 	}
 
 
-	private static <P extends Publisher<?>, M extends ReactiveHttpOutputMessage> Mono<Void> writeWithMessageWriters(
-			M outputMessage, BodyInserter.Context context, P body, ResolvableType bodyType) {
+	private static <M extends ReactiveHttpOutputMessage> Mono<Void> writeWithMessageWriters(
+			M outputMessage, BodyInserter.Context context, Object body, ResolvableType bodyType, @Nullable ReactiveAdapter adapter) {
 
+		Publisher<?> publisher;
+		if (body instanceof Publisher) {
+			publisher = (Publisher<?>) body;
+		}
+		else if (adapter != null) {
+			publisher = adapter.toPublisher(body);
+		}
+		else {
+			publisher = Mono.just(body);
+		}
 		MediaType mediaType = outputMessage.getHeaders().getContentType();
 		return context.messageWriters().stream()
 				.filter(messageWriter -> messageWriter.canWrite(bodyType, mediaType))
 				.findFirst()
 				.map(BodyInserters::cast)
-				.map(writer -> write(body, bodyType, mediaType, outputMessage, context, writer))
+				.map(writer -> write(publisher, bodyType, mediaType, outputMessage, context, writer))
 				.orElseGet(() -> Mono.error(unsupportedError(bodyType, context, mediaType)));
 	}
 
diff --git a/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClient.java b/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClient.java
index 81f7bb93fd..2be82f862b 100644
--- a/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClient.java
+++ b/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClient.java
@@ -61,6 +61,7 @@ import org.springframework.web.util.UriBuilderFactory;
  *
  * @author Rossen Stoyanchev
  * @author Brian Clozel
+ * @author Sebastien Deleuze
  * @since 5.0
  */
 class DefaultWebClient implements WebClient {
@@ -290,16 +291,27 @@ class DefaultWebClient implements WebClient {
 		}
 
 		@Override
-		public RequestHeadersSpec<?> body(BodyInserter<?, ? super ClientHttpRequest> inserter) {
-			this.inserter = inserter;
+		public RequestHeadersSpec<?> body(Object body) {
+			this.inserter = BodyInserters.fromObject(body);
+			return this;
+		}
+
+		@Override
+		public RequestHeadersSpec<?> body(Object producer, Class<?> elementClass) {
+			this.inserter = BodyInserters.fromProducer(producer, elementClass);
+			return this;
+		}
+
+		@Override
+		public RequestHeadersSpec<?> body(Object producer, ParameterizedTypeReference<?> elementType) {
+			this.inserter = BodyInserters.fromProducer(producer, elementType);
 			return this;
 		}
 
 		@Override
 		public <T, P extends Publisher<T>> RequestHeadersSpec<?> body(
-				P publisher, ParameterizedTypeReference<T> typeReference) {
-
-			this.inserter = BodyInserters.fromPublisher(publisher, typeReference);
+				P publisher, ParameterizedTypeReference<T> elementType) {
+			this.inserter = BodyInserters.fromPublisher(publisher, elementType);
 			return this;
 		}
 
@@ -310,13 +322,17 @@ class DefaultWebClient implements WebClient {
 		}
 
 		@Override
-		public RequestHeadersSpec<?> syncBody(Object body) {
-			Assert.isTrue(!(body instanceof Publisher),
-					"Please specify the element class by using body(Publisher, Class)");
-			this.inserter = BodyInserters.fromObject(body);
+		public RequestHeadersSpec<?> body(BodyInserter<?, ? super ClientHttpRequest> inserter) {
+			this.inserter = inserter;
 			return this;
 		}
 
+		@Override
+		@Deprecated
+		public RequestHeadersSpec<?> syncBody(Object body) {
+			return body(body);
+		}
+
 		@Override
 		public Mono<ClientResponse> exchange() {
 			ClientRequest request = (this.inserter != null ?
diff --git a/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/WebClient.java b/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/WebClient.java
index 1a7f366076..b5cdfed4c2 100644
--- a/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/WebClient.java
+++ b/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/WebClient.java
@@ -30,6 +30,7 @@ import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
 import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.core.ReactiveAdapterRegistry;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpStatus;
@@ -56,13 +57,15 @@ import org.springframework.web.util.UriBuilderFactory;
  * </ul>
  * <p>For examples with a request body see:
  * <ul>
+ * <li>{@link RequestBodySpec#body(Object) body(Object)}
  * <li>{@link RequestBodySpec#body(Publisher, Class) body(Publisher,Class)}
- * <li>{@link RequestBodySpec#syncBody(Object) syncBody(Object)}
+ * <li>{@link RequestBodySpec#body(Object, Class) body(Object,Class)}
  * <li>{@link RequestBodySpec#body(BodyInserter) body(BodyInserter)}
  * </ul>
  *
  * @author Rossen Stoyanchev
  * @author Arjen Poutsma
+ * @author Sebastien Deleuze
  * @since 5.0
  */
 public interface WebClient {
@@ -517,23 +520,80 @@ public interface WebClient {
 		RequestBodySpec contentType(MediaType contentType);
 
 		/**
-		 * Set the body of the request using the given body inserter.
-		 * {@link BodyInserters} provides access to built-in implementations of
-		 * {@link BodyInserter}.
-		 * @param inserter the body inserter to use for the request body
+		 * A shortcut for {@link #body(BodyInserter)} with an
+		 * {@linkplain BodyInserters#fromObject Object inserter}.
+		 * For example:
+		 * <p><pre class="code">
+		 * Person person = ... ;
+		 *
+		 * Mono&lt;Void&gt; result = client.post()
+		 *     .uri("/persons/{id}", id)
+		 *     .contentType(MediaType.APPLICATION_JSON)
+		 *     .body(person)
+		 *     .retrieve()
+		 *     .bodyToMono(Void.class);
+		 * </pre>
+		 * <p>For multipart requests, provide a
+		 * {@link org.springframework.util.MultiValueMap MultiValueMap}. The
+		 * values in the {@code MultiValueMap} can be any Object representing
+		 * the body of the part, or an
+		 * {@link org.springframework.http.HttpEntity HttpEntity} representing
+		 * a part with body and headers. The {@code MultiValueMap} can be built
+		 * with {@link org.springframework.http.client.MultipartBodyBuilder
+		 * MultipartBodyBuilder}.
+		 * @param body the {@code Object} to write to the request
 		 * @return this builder
-		 * @see org.springframework.web.reactive.function.BodyInserters
+		 * @throws IllegalArgumentException if {@code body} is a {@link Publisher} or an
+		 * instance of a type supported by {@link ReactiveAdapterRegistry#getSharedInstance()},
+		 * for which {@link #body(Publisher, Class)} or {@link #body(Object, Class)} should be used.
+		 * @since 5.2
 		 */
-		RequestHeadersSpec<?> body(BodyInserter<?, ? super ClientHttpRequest> inserter);
+		RequestHeadersSpec<?> body(Object body);
+
+		/**
+		 * A shortcut for {@link #body(BodyInserter)} with a
+		 * {@linkplain BodyInserters#fromProducer inserter}.
+		 * For example:
+		 * <p><pre>
+		 * Single&lt;Person&gt; personSingle = ... ;
+		 *
+		 * Mono&lt;Void&gt; result = client.post()
+		 *     .uri("/persons/{id}", id)
+		 *     .contentType(MediaType.APPLICATION_JSON)
+		 *     .body(personSingle, Person.class)
+		 *     .retrieve()
+		 *     .bodyToMono(Void.class);
+		 * </pre>
+		 * @param producer the producer to write to the request. This must be a
+		 * {@link Publisher} or another producer adaptable to a
+		 * {@code Publisher} via {@link ReactiveAdapterRegistry}
+		 * @param elementClass the class of elements contained in the producer
+		 * @return this builder
+		 * @since 5.2
+		 */
+		RequestHeadersSpec<?> body(Object producer, Class<?> elementClass);
+
+		/**
+		 * A variant of {@link #body(Object, Class)} that allows providing
+		 * element type information that includes generics via a
+		 * {@link ParameterizedTypeReference}.
+		 * @param producer the producer to write to the request. This must be a
+		 * {@link Publisher} or another producer adaptable to a
+		 * {@code Publisher} via {@link ReactiveAdapterRegistry}
+		 * @param elementType the type reference of elements contained in the producer
+		 * @return this builder
+		 * @since 5.2
+		 */
+		RequestHeadersSpec<?> body(Object producer, ParameterizedTypeReference<?> elementType);
 
 		/**
 		 * A shortcut for {@link #body(BodyInserter)} with a
 		 * {@linkplain BodyInserters#fromPublisher Publisher inserter}.
 		 * For example:
 		 * <p><pre>
-		 * Mono<Person> personMono = ... ;
+		 * Mono&lt;Person&gt; personMono = ... ;
 		 *
-		 * Mono<Void> result = client.post()
+		 * Mono&lt;Void&gt; result = client.post()
 		 *     .uri("/persons/{id}", id)
 		 *     .contentType(MediaType.APPLICATION_JSON)
 		 *     .body(personMono, Person.class)
@@ -553,13 +613,23 @@ public interface WebClient {
 		 * element type information that includes generics via a
 		 * {@link ParameterizedTypeReference}.
 		 * @param publisher the {@code Publisher} to write to the request
-		 * @param typeReference the type reference of elements contained in the publisher
+		 * @param elementType the type reference of elements contained in the publisher
 		 * @param <T> the type of the elements contained in the publisher
 		 * @param <P> the type of the {@code Publisher}
 		 * @return this builder
 		 */
 		<T, P extends Publisher<T>> RequestHeadersSpec<?> body(P publisher,
-				ParameterizedTypeReference<T> typeReference);
+				ParameterizedTypeReference<T> elementType);
+
+		/**
+		 * Set the body of the request using the given body inserter.
+		 * {@link BodyInserters} provides access to built-in implementations of
+		 * {@link BodyInserter}.
+		 * @param inserter the body inserter to use for the request body
+		 * @return this builder
+		 * @see org.springframework.web.reactive.function.BodyInserters
+		 */
+		RequestHeadersSpec<?> body(BodyInserter<?, ? super ClientHttpRequest> inserter);
 
 		/**
 		 * A shortcut for {@link #body(BodyInserter)} with an
@@ -585,7 +655,12 @@ public interface WebClient {
 		 * MultipartBodyBuilder}.
 		 * @param body the {@code Object} to write to the request
 		 * @return this builder
+		 * @throws IllegalArgumentException if {@code body} is a {@link Publisher} or an
+		 * instance of a type supported by {@link ReactiveAdapterRegistry#getSharedInstance()},
+		 * for which {@link #body(Publisher, Class)} or {@link #body(Object, Class)} should be used.
+		 * @deprecated as of Spring Framework 5.2 in favor of {@link #body(Object)}
 		 */
+		@Deprecated
 		RequestHeadersSpec<?> syncBody(Object body);
 	}
 
diff --git a/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/DefaultServerResponseBuilder.java b/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/DefaultServerResponseBuilder.java
index cabbe2bf04..49e35a9cf3 100644
--- a/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/DefaultServerResponseBuilder.java
+++ b/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/DefaultServerResponseBuilder.java
@@ -59,6 +59,7 @@ import org.springframework.web.server.ServerWebExchange;
  *
  * @author Arjen Poutsma
  * @author Juergen Hoeller
+ * @author Sebastien Deleuze
  * @since 5.0
  */
 class DefaultServerResponseBuilder implements ServerResponse.BodyBuilder {
@@ -222,10 +223,43 @@ class DefaultServerResponseBuilder implements ServerResponse.BodyBuilder {
 	}
 
 	@Override
-	public <T, P extends Publisher<T>> Mono<ServerResponse> body(P publisher, Class<T> elementClass) {
-		Assert.notNull(publisher, "Publisher must not be null");
-		Assert.notNull(elementClass, "Element Class must not be null");
+	public Mono<ServerResponse> body(Object body) {
+		return new DefaultEntityResponseBuilder<>(body,
+				BodyInserters.fromObject(body))
+				.status(this.statusCode)
+				.headers(this.headers)
+				.cookies(cookies -> cookies.addAll(this.cookies))
+				.hints(hints -> hints.putAll(this.hints))
+				.build()
+				.map(entityResponse -> entityResponse);
+	}
 
+	@Override
+	public Mono<ServerResponse> body(Object producer, Class<?> elementClass) {
+		return new DefaultEntityResponseBuilder<>(producer,
+				BodyInserters.fromProducer(producer, elementClass))
+				.status(this.statusCode)
+				.headers(this.headers)
+				.cookies(cookies -> cookies.addAll(this.cookies))
+				.hints(hints -> hints.putAll(this.hints))
+				.build()
+				.map(entityResponse -> entityResponse);
+	}
+
+	@Override
+	public Mono<ServerResponse> body(Object producer, ParameterizedTypeReference<?> elementType) {
+		return new DefaultEntityResponseBuilder<>(producer,
+				BodyInserters.fromProducer(producer, elementType))
+				.status(this.statusCode)
+				.headers(this.headers)
+				.cookies(cookies -> cookies.addAll(this.cookies))
+				.hints(hints -> hints.putAll(this.hints))
+				.build()
+				.map(entityResponse -> entityResponse);
+	}
+
+	@Override
+	public <T, P extends Publisher<T>> Mono<ServerResponse> body(P publisher, Class<T> elementClass) {
 		return new DefaultEntityResponseBuilder<>(publisher,
 				BodyInserters.fromPublisher(publisher, elementClass))
 				.status(this.statusCode)
@@ -238,13 +272,9 @@ class DefaultServerResponseBuilder implements ServerResponse.BodyBuilder {
 
 	@Override
 	public <T, P extends Publisher<T>> Mono<ServerResponse> body(P publisher,
-			ParameterizedTypeReference<T> typeReference) {
-
-		Assert.notNull(publisher, "Publisher must not be null");
-		Assert.notNull(typeReference, "ParameterizedTypeReference must not be null");
-
+			ParameterizedTypeReference<T> elementType) {
 		return new DefaultEntityResponseBuilder<>(publisher,
-				BodyInserters.fromPublisher(publisher, typeReference))
+				BodyInserters.fromPublisher(publisher, elementType))
 				.status(this.statusCode)
 				.headers(this.headers)
 				.cookies(cookies -> cookies.addAll(this.cookies))
@@ -254,19 +284,9 @@ class DefaultServerResponseBuilder implements ServerResponse.BodyBuilder {
 	}
 
 	@Override
+	@Deprecated
 	public Mono<ServerResponse> syncBody(Object body) {
-		Assert.notNull(body, "Body must not be null");
-		Assert.isTrue(!(body instanceof Publisher),
-				"Please specify the element class by using body(Publisher, Class)");
-
-		return new DefaultEntityResponseBuilder<>(body,
-				BodyInserters.fromObject(body))
-				.status(this.statusCode)
-				.headers(this.headers)
-				.cookies(cookies -> cookies.addAll(this.cookies))
-				.hints(hints -> hints.putAll(this.hints))
-				.build()
-				.map(entityResponse -> entityResponse);
+		return body(body);
 	}
 
 	@Override
diff --git a/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/EntityResponse.java b/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/EntityResponse.java
index ab72a30f5a..152b038770 100644
--- a/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/EntityResponse.java
+++ b/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/EntityResponse.java
@@ -64,12 +64,38 @@ public interface EntityResponse<T> extends ServerResponse {
 
 	/**
 	 * Create a builder with the given object.
-	 * @param t the object that represents the body of the response
-	 * @param <T> the type of the elements contained in the publisher
+	 * @param body the object that represents the body of the response
+	 * @param <T> the type of the body
 	 * @return the created builder
 	 */
-	static <T> Builder<T> fromObject(T t) {
-		return new DefaultEntityResponseBuilder<>(t, BodyInserters.fromObject(t));
+	static <T> Builder<T> fromObject(T body) {
+		return new DefaultEntityResponseBuilder<>(body, BodyInserters.fromObject(body));
+	}
+
+	/**
+	 * Create a builder with the given producer.
+	 * @param producer the producer that represents the body of the response
+	 * @param elementClass the class of elements contained in the publisher
+	 * @return the created builder
+	 * @since 5.2
+	 */
+	static <T> Builder<T> fromProducer(T producer, Class<?> elementClass) {
+		return new DefaultEntityResponseBuilder<>(producer,
+				BodyInserters.fromProducer(producer, elementClass));
+	}
+
+	/**
+	 * Create a builder with the given producer.
+	 * @param producer the producer that represents the body of the response
+	 * @param typeReference the type of elements contained in the producer
+	 * @return the created builder
+	 * @since 5.2
+	 */
+	static <T> Builder<T> fromProducer(T producer,
+			ParameterizedTypeReference<?> typeReference) {
+
+		return new DefaultEntityResponseBuilder<>(producer,
+				BodyInserters.fromProducer(producer, typeReference));
 	}
 
 	/**
diff --git a/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/ServerResponse.java b/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/ServerResponse.java
index 286845d9da..41a2fce19b 100644
--- a/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/ServerResponse.java
+++ b/spring-webflux/src/main/java/org/springframework/web/reactive/function/server/ServerResponse.java
@@ -30,6 +30,7 @@ import org.reactivestreams.Publisher;
 import reactor.core.publisher.Mono;
 
 import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.core.ReactiveAdapterRegistry;
 import org.springframework.http.CacheControl;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
@@ -384,6 +385,45 @@ public interface ServerResponse {
 		 */
 		BodyBuilder hints(Consumer<Map<String, Object>> hintsConsumer);
 
+		/**
+		 * Set the body of the response to the given {@code Object} and return it.
+		 * This convenience method combines {@link #body(BodyInserter)} and
+		 * {@link BodyInserters#fromObject(Object)}.
+		 * @param body the body of the response
+		 * @return the built response
+		 * @throws IllegalArgumentException if {@code body} is a {@link Publisher} or an
+		 * instance of a type supported by {@link ReactiveAdapterRegistry#getSharedInstance()},
+		 * for which {@link #body(Publisher, Class)} or {@link #body(Object, Class)} should be used.
+		 * @since 5.2
+		 */
+		Mono<ServerResponse> body(Object body);
+
+		/**
+		 * Set the body of the response to the given asynchronous {@code Publisher} and return it.
+		 * This convenience method combines {@link #body(BodyInserter)} and
+		 * {@link BodyInserters#fromProducer(Object, Class)}.
+		 * @param producer the producer to write to the response. This must be a
+		 * {@link Publisher} or another producer adaptable to a
+		 * {@code Publisher} via {@link ReactiveAdapterRegistry}
+		 * @param elementClass the class of elements contained in the producer
+		 * @return the built response
+		 * @since 5.2
+		 */
+		Mono<ServerResponse> body(Object producer, Class<?> elementClass);
+
+		/**
+		 * Set the body of the response to the given asynchronous {@code Publisher} and return it.
+		 * This convenience method combines {@link #body(BodyInserter)} and
+		 * {@link BodyInserters#fromProducer(Object, ParameterizedTypeReference)}.
+		 * @param producer the producer to write to the response. This must be a
+		 * {@link Publisher} or another producer adaptable to a
+		 * {@code Publisher} via {@link ReactiveAdapterRegistry}
+		 * @param typeReference a type reference describing the elements contained in the producer
+		 * @return the built response
+		 * @since 5.2
+		 */
+		Mono<ServerResponse> body(Object producer, ParameterizedTypeReference<?> typeReference);
+
 		/**
 		 * Set the body of the response to the given asynchronous {@code Publisher} and return it.
 		 * This convenience method combines {@link #body(BodyInserter)} and
@@ -399,7 +439,7 @@ public interface ServerResponse {
 		/**
 		 * Set the body of the response to the given asynchronous {@code Publisher} and return it.
 		 * This convenience method combines {@link #body(BodyInserter)} and
-		 * {@link BodyInserters#fromPublisher(Publisher, Class)}.
+		 * {@link BodyInserters#fromPublisher(Publisher, ParameterizedTypeReference)}.
 		 * @param publisher the {@code Publisher} to write to the response
 		 * @param typeReference a type reference describing the elements contained in the publisher
 		 * @param <T> the type of the elements contained in the publisher
@@ -410,23 +450,28 @@ public interface ServerResponse {
 				ParameterizedTypeReference<T> typeReference);
 
 		/**
-		 * Set the body of the response to the given synchronous {@code Object} and return it.
+		 * Set the body of the response to the given {@code BodyInserter} and return it.
+		 * @param inserter the {@code BodyInserter} that writes to the response
+		 * @return the built response
+		 */
+		Mono<ServerResponse> body(BodyInserter<?, ? super ServerHttpResponse> inserter);
+
+		/**
+		 * Set the body of the response to the given {@code Object} and return it.
 		 * This convenience method combines {@link #body(BodyInserter)} and
 		 * {@link BodyInserters#fromObject(Object)}.
 		 * @param body the body of the response
 		 * @return the built response
 		 * @throws IllegalArgumentException if {@code body} is a {@link Publisher}, for which
 		 * {@link #body(Publisher, Class)} should be used.
+		 * @throws IllegalArgumentException if {@code body} is a {@link Publisher} or an
+		 * instance of a type supported by {@link ReactiveAdapterRegistry#getSharedInstance()},
+		 * for which {@link #body(Publisher, Class)} or {@link #body(Object, Class)} should be used.
+		 * @deprecated as of Spring Framework 5.2 in favor of {@link #body(Object)}
 		 */
+		@Deprecated
 		Mono<ServerResponse> syncBody(Object body);
 
-		/**
-		 * Set the body of the response to the given {@code BodyInserter} and return it.
-		 * @param inserter the {@code BodyInserter} that writes to the response
-		 * @return the built response
-		 */
-		Mono<ServerResponse> body(BodyInserter<?, ? super ServerHttpResponse> inserter);
-
 		/**
 		 * Render the template with the given {@code name} using the given {@code modelAttributes}.
 		 * The model attributes are mapped under a
diff --git a/spring-webflux/src/main/kotlin/org/springframework/web/reactive/function/client/WebClientExtensions.kt b/spring-webflux/src/main/kotlin/org/springframework/web/reactive/function/client/WebClientExtensions.kt
index ef4edb4429..fed3f65291 100644
--- a/spring-webflux/src/main/kotlin/org/springframework/web/reactive/function/client/WebClientExtensions.kt
+++ b/spring-webflux/src/main/kotlin/org/springframework/web/reactive/function/client/WebClientExtensions.kt
@@ -16,14 +16,10 @@
 
 package org.springframework.web.reactive.function.client
 
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.FlowPreview
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.reactive.awaitSingle
 import kotlinx.coroutines.reactive.flow.asFlow
-import kotlinx.coroutines.reactive.flow.asPublisher
-import kotlinx.coroutines.reactor.mono
 import org.reactivestreams.Publisher
 import org.springframework.core.ParameterizedTypeReference
 import org.springframework.web.reactive.function.client.WebClient.RequestBodySpec
@@ -39,20 +35,59 @@ import reactor.core.publisher.Mono
  * @author Sebastien Deleuze
  * @since 5.0
  */
+@Deprecated("Use 'bodyWithType' instead.", replaceWith = ReplaceWith("bodyWithType(publisher)"))
+@Suppress("EXTENSION_SHADOWED_BY_MEMBER")
 inline fun <reified T : Any, S : Publisher<T>> RequestBodySpec.body(publisher: S): RequestHeadersSpec<*> =
 		body(publisher, object : ParameterizedTypeReference<T>() {})
 
 /**
- * Coroutines [Flow] based extension for [WebClient.RequestBodySpec.body] providing a
- * body(Flow<T>)` variant leveraging Kotlin reified type parameters. This extension is
- * not subject to type erasure and retains actual generic type arguments.
- *
+ * Extension for [WebClient.RequestBodySpec.body] providing a `bodyWithType<T>(Any)` variant
+ * leveraging Kotlin reified type parameters. This extension is not subject to type
+ * erasure and retains actual generic type arguments.
+ * @param producer the producer to write to the request. This must be a
+ * [Publisher] or another producer adaptable to a
+ * [Publisher] via [org.springframework.core.ReactiveAdapterRegistry]
+ * @param <T> the type of the elements contained in the producer
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+inline fun <reified T : Any> RequestBodySpec.bodyWithType(producer: Any): RequestHeadersSpec<*> =
+		body(producer, object : ParameterizedTypeReference<T>() {})
+
+/**
+ * Extension for [WebClient.RequestBodySpec.body] providing a `bodyWithType(Publisher<T>)` variant
+ * leveraging Kotlin reified type parameters. This extension is not subject to type
+ * erasure and retains actual generic type arguments.
+ * @param publisher the [Publisher] to write to the request
+ * @param <T> the type of the elements contained in the publisher
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+inline fun <reified T : Any> RequestBodySpec.bodyWithType(publisher: Publisher<T>): RequestHeadersSpec<*> =
+		body(publisher, object : ParameterizedTypeReference<T>() {})
+
+/**
+ * Extension for [WebClient.RequestBodySpec.body] providing a `bodyWithType(Flow<T>)` variant
+ * leveraging Kotlin reified type parameters. This extension is not subject to type
+ * erasure and retains actual generic type arguments.
+ * @param flow the [Flow] to write to the request
+ * @param <T> the type of the elements contained in the flow
  * @author Sebastien Deleuze
  * @since 5.2
  */
 @FlowPreview
-inline fun <reified T : Any, S : Flow<T>> RequestBodySpec.body(flow: S): RequestHeadersSpec<*> =
-		body(flow.asPublisher(), object : ParameterizedTypeReference<T>() {})
+inline fun <reified T : Any> RequestBodySpec.bodyWithType(flow: Flow<T>): RequestHeadersSpec<*> =
+		body(flow, object : ParameterizedTypeReference<T>() {})
+
+/**
+ * Coroutines variant of [WebClient.RequestHeadersSpec.exchange].
+ *
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+suspend fun RequestHeadersSpec<out RequestHeadersSpec<*>>.awaitExchange(): ClientResponse =
+		exchange().awaitSingle()
+
 
 /**
  * Extension for [WebClient.ResponseSpec.bodyToMono] providing a `bodyToMono<Foo>()` variant
@@ -90,25 +125,6 @@ inline fun <reified T : Any> WebClient.ResponseSpec.bodyToFlux(): Flux<T> =
 inline fun <reified T : Any> WebClient.ResponseSpec.bodyToFlow(batchSize: Int = 1): Flow<T> =
 		bodyToFlux<T>().asFlow(batchSize)
 
-
-/**
- * Coroutines variant of [WebClient.RequestHeadersSpec.exchange].
- *
- * @author Sebastien Deleuze
- * @since 5.2
- */
-suspend fun RequestHeadersSpec<out RequestHeadersSpec<*>>.awaitExchange(): ClientResponse =
-		exchange().awaitSingle()
-
-/**
- * Coroutines variant of [WebClient.RequestBodySpec.body].
- *
- * @author Sebastien Deleuze
- * @since 5.2
- */
-inline fun <reified T: Any> RequestBodySpec.body(crossinline supplier: suspend () -> T)
-		= body(GlobalScope.mono(Dispatchers.Unconfined) { supplier.invoke() })
-
 /**
  * Coroutines variant of [WebClient.ResponseSpec.bodyToMono].
  *
diff --git a/spring-webflux/src/main/kotlin/org/springframework/web/reactive/function/server/ServerResponseExtensions.kt b/spring-webflux/src/main/kotlin/org/springframework/web/reactive/function/server/ServerResponseExtensions.kt
index 8ed19bca04..01b8345f1a 100644
--- a/spring-webflux/src/main/kotlin/org/springframework/web/reactive/function/server/ServerResponseExtensions.kt
+++ b/spring-webflux/src/main/kotlin/org/springframework/web/reactive/function/server/ServerResponseExtensions.kt
@@ -19,7 +19,6 @@ package org.springframework.web.reactive.function.server
 import kotlinx.coroutines.FlowPreview
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.reactive.awaitSingle
-import kotlinx.coroutines.reactive.flow.asPublisher
 import org.reactivestreams.Publisher
 import org.springframework.core.ParameterizedTypeReference
 import org.springframework.http.MediaType
@@ -33,9 +32,63 @@ import reactor.core.publisher.Mono
  * @author Sebastien Deleuze
  * @since 5.0
  */
+@Deprecated("Use 'bodyWithType' instead.", replaceWith = ReplaceWith("bodyWithType(publisher)"))
+@Suppress("EXTENSION_SHADOWED_BY_MEMBER")
 inline fun <reified T : Any> ServerResponse.BodyBuilder.body(publisher: Publisher<T>): Mono<ServerResponse> =
 		body(publisher, object : ParameterizedTypeReference<T>() {})
 
+/**
+ * Extension for [ServerResponse.BodyBuilder.body] providing a `bodyWithType<T>(Any)` variant
+ * leveraging Kotlin reified type parameters. This extension is not subject to type
+ * erasure and retains actual generic type arguments.
+ * @param producer the producer to write to the response. This must be a
+ * [Publisher] or another producer adaptable to a
+ * [Publisher] via [org.springframework.core.ReactiveAdapterRegistry]
+ * @param <T> the type of the elements contained in the producer
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+inline fun <reified T : Any> ServerResponse.BodyBuilder.bodyWithType(producer: Any): Mono<ServerResponse> =
+		body(producer, object : ParameterizedTypeReference<T>() {})
+
+/**
+ * Extension for [ServerResponse.BodyBuilder.body] providing a `bodyWithType(Publisher<T>)` variant
+ * leveraging Kotlin reified type parameters. This extension is not subject to type
+ * erasure and retains actual generic type arguments.
+ * @param publisher the [Publisher] to write to the response
+ * @param <T> the type of the elements contained in the publisher
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+inline fun <reified T : Any> ServerResponse.BodyBuilder.bodyWithType(publisher: Publisher<T>): Mono<ServerResponse> =
+		body(publisher, object : ParameterizedTypeReference<T>() {})
+
+/**
+ * Coroutines variant of [ServerResponse.BodyBuilder.body] with an [Any] parameter.
+ *
+ * Set the body of the response to the given {@code Object} and return it.
+ * This convenience method combines [body] and
+ * [org.springframework.web.reactive.function.BodyInserters.fromObject].
+ * @param body the body of the response
+ * @return the built response
+ * @throws IllegalArgumentException if `body` is a [Publisher] or an
+ * instance of a type supported by [org.springframework.core.ReactiveAdapterRegistry.getSharedInstance],
+ */
+suspend fun ServerResponse.BodyBuilder.bodyAndAwait(body: Any): ServerResponse =
+		body(body).awaitSingle()
+
+/**
+ * Coroutines variant of [ServerResponse.BodyBuilder.body] with [Any] and
+ * [ParameterizedTypeReference] parameters providing a `bodyAndAwait(Flow<T>)` variant.
+ * This extension is not subject to type erasure and retains actual generic type arguments.
+ *
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+@FlowPreview
+suspend inline fun <reified T : Any> ServerResponse.BodyBuilder.bodyAndAwait(flow: Flow<T>): ServerResponse =
+		body(flow, object : ParameterizedTypeReference<T>() {}).awaitSingle()
+
 /**
  * Extension for [ServerResponse.BodyBuilder.body] providing a
  * `bodyToServerSentEvents(Publisher<T>)` variant. This extension is not subject to type
@@ -44,7 +97,7 @@ inline fun <reified T : Any> ServerResponse.BodyBuilder.body(publisher: Publishe
  * @author Sebastien Deleuze
  * @since 5.0
  */
-@Deprecated("Use 'sse().body()' instead.")
+@Deprecated("Use 'sse().bodyWithType(publisher)' instead.", replaceWith = ReplaceWith("sse().bodyWithType(publisher)"))
 inline fun <reified T : Any> ServerResponse.BodyBuilder.bodyToServerSentEvents(publisher: Publisher<T>): Mono<ServerResponse> =
 		contentType(MediaType.TEXT_EVENT_STREAM).body(publisher, object : ParameterizedTypeReference<T>() {})
 
@@ -77,38 +130,7 @@ fun ServerResponse.BodyBuilder.html() = contentType(MediaType.TEXT_HTML)
 fun ServerResponse.BodyBuilder.sse() = contentType(MediaType.TEXT_EVENT_STREAM)
 
 /**
- * Coroutines variant of [ServerResponse.HeadersBuilder.build].
- *
- * @author Sebastien Deleuze
- * @since 5.2
- */
-suspend fun ServerResponse.HeadersBuilder<out ServerResponse.HeadersBuilder<*>>.buildAndAwait(): ServerResponse =
-		build().awaitSingle()
-
-/**
- * Coroutines [Flow] based extension for [ServerResponse.BodyBuilder.body] providing a
- * `bodyFlowAndAwait(Flow<T>)` variant. This extension is not subject to type erasure and retains
- * actual generic type arguments.
- *
- * @author Sebastien Deleuze
- * @since 5.2
- */
-@FlowPreview
-suspend inline fun <reified T : Any> ServerResponse.BodyBuilder.bodyFlowAndAwait(flow: Flow<T>): ServerResponse =
-		body(flow.asPublisher(), object : ParameterizedTypeReference<T>() {}).awaitSingle()
-
-/**
- * Coroutines variant of [ServerResponse.BodyBuilder.syncBody].
- *
- * @author Sebastien Deleuze
- * @since 5.2
- */
-suspend fun ServerResponse.BodyBuilder.bodyAndAwait(body: Any): ServerResponse =
-		syncBody(body).awaitSingle()
-
-/**
- * Coroutines variant of [ServerResponse.BodyBuilder.syncBody] without the sync prefix since it is ok to use it within
- * another suspendable function.
+ * Coroutines variant of [ServerResponse.BodyBuilder.render].
  *
  * @author Sebastien Deleuze
  * @since 5.2
@@ -117,11 +139,20 @@ suspend fun ServerResponse.BodyBuilder.renderAndAwait(name: String, vararg model
 		render(name, *modelAttributes).awaitSingle()
 
 /**
- * Coroutines variant of [ServerResponse.BodyBuilder.syncBody] without the sync prefix since it is ok to use it within
- * another suspendable function.
+ * Coroutines variant of [ServerResponse.BodyBuilder.render].
  *
  * @author Sebastien Deleuze
  * @since 5.2
  */
 suspend fun ServerResponse.BodyBuilder.renderAndAwait(name: String, model: Map<String, *>): ServerResponse =
 		render(name, model).awaitSingle()
+
+/**
+ * Coroutines variant of [ServerResponse.HeadersBuilder.build].
+ *
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+suspend fun ServerResponse.HeadersBuilder<out ServerResponse.HeadersBuilder<*>>.buildAndAwait(): ServerResponse =
+		build().awaitSingle()
+
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/function/BodyInsertersTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/function/BodyInsertersTests.java
index 39076cac07..a54bfc85f4 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/function/BodyInsertersTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/function/BodyInsertersTests.java
@@ -30,6 +30,7 @@ import java.util.Map;
 import java.util.Optional;
 
 import com.fasterxml.jackson.annotation.JsonView;
+import io.reactivex.Single;
 import org.junit.Before;
 import org.junit.Test;
 import reactor.core.publisher.Flux;
@@ -159,6 +160,51 @@ public class BodyInsertersTests {
 				.verify();
 	}
 
+	@Test
+	public void ofProducerWithMono() {
+		Mono<User> body = Mono.just(new User("foo", "bar"));
+		BodyInserter<?, ReactiveHttpOutputMessage> inserter = BodyInserters.fromProducer(body, User.class);
+
+		MockServerHttpResponse response = new MockServerHttpResponse();
+		Mono<Void> result = inserter.insert(response, this.context);
+		StepVerifier.create(result).expectComplete().verify();
+		StepVerifier.create(response.getBodyAsString())
+				.expectNext("{\"username\":\"foo\",\"password\":\"bar\"}")
+				.expectComplete()
+				.verify();
+	}
+
+	@Test
+	public void ofProducerWithFlux() {
+		Flux<String> body = Flux.just("foo");
+		BodyInserter<?, ReactiveHttpOutputMessage> inserter = BodyInserters.fromProducer(body, String.class);
+
+		MockServerHttpResponse response = new MockServerHttpResponse();
+		Mono<Void> result = inserter.insert(response, this.context);
+		StepVerifier.create(result).expectComplete().verify();
+		StepVerifier.create(response.getBody())
+				.consumeNextWith(buf -> {
+					String actual = DataBufferTestUtils.dumpString(buf, UTF_8);
+					assertThat(actual).isEqualTo("foo");
+				})
+				.expectComplete()
+				.verify();
+	}
+
+	@Test
+	public void ofProducerWithSingle() {
+		Single<User> body = Single.just(new User("foo", "bar"));
+		BodyInserter<?, ReactiveHttpOutputMessage> inserter = BodyInserters.fromProducer(body, User.class);
+
+		MockServerHttpResponse response = new MockServerHttpResponse();
+		Mono<Void> result = inserter.insert(response, this.context);
+		StepVerifier.create(result).expectComplete().verify();
+		StepVerifier.create(response.getBodyAsString())
+				.expectNext("{\"username\":\"foo\",\"password\":\"bar\"}")
+				.expectComplete()
+				.verify();
+	}
+
 	@Test
 	public void ofPublisher() {
 		Flux<String> body = Flux.just("foo");
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/function/MultipartIntegrationTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/function/MultipartIntegrationTests.java
index 51b19b0677..deeb681a43 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/function/MultipartIntegrationTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/function/MultipartIntegrationTests.java
@@ -61,7 +61,7 @@ public class MultipartIntegrationTests extends AbstractRouterFunctionIntegration
 		Mono<ClientResponse> result = webClient
 				.post()
 				.uri("http://localhost:" + this.port + "/multipartData")
-				.syncBody(generateBody())
+				.body(generateBody())
 				.exchange();
 
 		StepVerifier
@@ -75,7 +75,7 @@ public class MultipartIntegrationTests extends AbstractRouterFunctionIntegration
 		Mono<ClientResponse> result = webClient
 				.post()
 				.uri("http://localhost:" + this.port + "/parts")
-				.syncBody(generateBody())
+				.body(generateBody())
 				.exchange();
 
 		StepVerifier
@@ -89,7 +89,7 @@ public class MultipartIntegrationTests extends AbstractRouterFunctionIntegration
 		Mono<String> result = webClient
 				.post()
 				.uri("http://localhost:" + this.port + "/transferTo")
-				.syncBody(generateBody())
+				.body(generateBody())
 				.retrieve()
 				.bodyToMono(String.class);
 
@@ -169,7 +169,7 @@ public class MultipartIntegrationTests extends AbstractRouterFunctionIntegration
 							Path tempFile = Files.createTempFile("MultipartIntegrationTests", null);
 							return part.transferTo(tempFile)
 									.then(ServerResponse.ok()
-											.syncBody(tempFile.toString()));
+											.body(tempFile.toString()));
 						}
 						catch (Exception e) {
 							return Mono.error(e);
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/DefaultWebClientTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/DefaultWebClientTests.java
index 99f1a354d3..275d51a3f0 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/DefaultWebClientTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/DefaultWebClientTests.java
@@ -186,7 +186,7 @@ public class DefaultWebClientTests {
 		WebClient client = this.builder.build();
 
 		assertThatIllegalArgumentException().isThrownBy(() ->
-				client.post().uri("https://example.com").syncBody(mono));
+				client.post().uri("https://example.com").body(mono));
 	}
 
 	@Test
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/WebClientIntegrationTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/WebClientIntegrationTests.java
index 12cb207b46..274c545418 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/WebClientIntegrationTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/WebClientIntegrationTests.java
@@ -354,7 +354,7 @@ public class WebClientIntegrationTests {
 				.uri("/pojo/capitalize")
 				.accept(MediaType.APPLICATION_JSON)
 				.contentType(MediaType.APPLICATION_JSON)
-				.syncBody(new Pojo("foofoo", "barbar"))
+				.body(new Pojo("foofoo", "barbar"))
 				.retrieve()
 				.bodyToMono(Pojo.class);
 
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/DefaultEntityResponseBuilderTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/DefaultEntityResponseBuilderTests.java
index 81ed266c56..2f0dcc8e0c 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/DefaultEntityResponseBuilderTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/DefaultEntityResponseBuilderTests.java
@@ -24,6 +24,7 @@ import java.util.EnumSet;
 import java.util.List;
 import java.util.Set;
 
+import io.reactivex.Single;
 import org.junit.Test;
 import org.reactivestreams.Publisher;
 import reactor.core.publisher.Flux;
@@ -76,6 +77,14 @@ public class DefaultEntityResponseBuilderTests {
 		assertThat(response.entity()).isSameAs(body);
 	}
 
+	@Test
+	public void fromProducer() {
+		Single<String> body = Single.just("foo");
+		ParameterizedTypeReference<String> typeReference = new ParameterizedTypeReference<String>() {};
+		EntityResponse<Single<String>> response = EntityResponse.fromProducer(body, typeReference).build().block();
+		assertThat(response.entity()).isSameAs(body);
+	}
+
 	@Test
 	public void status() {
 		String body = "foo";
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/DefaultServerResponseBuilderTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/DefaultServerResponseBuilderTests.java
index 5c0bed8cf1..979abb0302 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/DefaultServerResponseBuilderTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/DefaultServerResponseBuilderTests.java
@@ -308,7 +308,7 @@ public class DefaultServerResponseBuilderTests {
 	public void copyCookies() {
 		Mono<ServerResponse> serverResponse = ServerResponse.ok()
 				.cookie(ResponseCookie.from("foo", "bar").build())
-				.syncBody("body");
+				.body("body");
 
 		assertThat(serverResponse.block().cookies().isEmpty()).isFalse();
 
@@ -360,7 +360,7 @@ public class DefaultServerResponseBuilderTests {
 		Mono<Void> mono = Mono.empty();
 
 		assertThatIllegalArgumentException().isThrownBy(() ->
-				ServerResponse.ok().syncBody(mono));
+				ServerResponse.ok().body(mono));
 	}
 
 	@Test
@@ -368,7 +368,7 @@ public class DefaultServerResponseBuilderTests {
 		String etag = "\"foo\"";
 		ServerResponse responseMono = ServerResponse.ok()
 				.eTag(etag)
-				.syncBody("bar")
+				.body("bar")
 				.block();
 
 		MockServerHttpRequest request = MockServerHttpRequest.get("https://example.com")
@@ -392,7 +392,7 @@ public class DefaultServerResponseBuilderTests {
 
 		ServerResponse responseMono = ServerResponse.ok()
 				.lastModified(oneMinuteBeforeNow)
-				.syncBody("bar")
+				.body("bar")
 				.block();
 
 		MockServerHttpRequest request = MockServerHttpRequest.get("https://example.com")
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/InvalidHttpMethodIntegrationTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/InvalidHttpMethodIntegrationTests.java
index 206f0f7abf..4257e8f040 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/InvalidHttpMethodIntegrationTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/InvalidHttpMethodIntegrationTests.java
@@ -33,8 +33,8 @@ public class InvalidHttpMethodIntegrationTests extends AbstractRouterFunctionInt
 	@Override
 	protected RouterFunction<?> routerFunction() {
 		return RouterFunctions.route(RequestPredicates.GET("/"),
-				request -> ServerResponse.ok().syncBody("FOO"))
-				.andRoute(RequestPredicates.all(), request -> ServerResponse.ok().syncBody("BAR"));
+				request -> ServerResponse.ok().body("FOO"))
+				.andRoute(RequestPredicates.all(), request -> ServerResponse.ok().body("BAR"));
 	}
 
 	@Test
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/NestedRouteIntegrationTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/NestedRouteIntegrationTests.java
index 93873d62e3..a8ad88c02b 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/NestedRouteIntegrationTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/function/server/NestedRouteIntegrationTests.java
@@ -125,7 +125,7 @@ public class NestedRouteIntegrationTests extends AbstractRouterFunctionIntegrati
 
 		public Mono<ServerResponse> pattern(ServerRequest request) {
 			String pattern = matchingPattern(request).getPatternString();
-			return ServerResponse.ok().syncBody(pattern);
+			return ServerResponse.ok().body(pattern);
 		}
 
 		@SuppressWarnings("unchecked")
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/MultipartIntegrationTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/MultipartIntegrationTests.java
index be7dc30f42..0926c28af8 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/MultipartIntegrationTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/MultipartIntegrationTests.java
@@ -85,7 +85,7 @@ public class MultipartIntegrationTests extends AbstractHttpHandlerIntegrationTes
 		Mono<ClientResponse> result = webClient
 				.post()
 				.uri("/requestPart")
-				.syncBody(generateBody())
+				.body(generateBody())
 				.exchange();
 
 		StepVerifier
@@ -99,7 +99,7 @@ public class MultipartIntegrationTests extends AbstractHttpHandlerIntegrationTes
 		Mono<String> result = webClient
 				.post()
 				.uri("/requestBodyMap")
-				.syncBody(generateBody())
+				.body(generateBody())
 				.retrieve()
 				.bodyToMono(String.class);
 
@@ -113,7 +113,7 @@ public class MultipartIntegrationTests extends AbstractHttpHandlerIntegrationTes
 		Mono<String> result = webClient
 				.post()
 				.uri("/requestBodyFlux")
-				.syncBody(generateBody())
+				.body(generateBody())
 				.retrieve()
 				.bodyToMono(String.class);
 
@@ -127,7 +127,7 @@ public class MultipartIntegrationTests extends AbstractHttpHandlerIntegrationTes
 		Mono<String> result = webClient
 				.post()
 				.uri("/filePartFlux")
-				.syncBody(generateBody())
+				.body(generateBody())
 				.retrieve()
 				.bodyToMono(String.class);
 
@@ -141,7 +141,7 @@ public class MultipartIntegrationTests extends AbstractHttpHandlerIntegrationTes
 		Mono<String> result = webClient
 				.post()
 				.uri("/filePartMono")
-				.syncBody(generateBody())
+				.body(generateBody())
 				.retrieve()
 				.bodyToMono(String.class);
 
@@ -155,7 +155,7 @@ public class MultipartIntegrationTests extends AbstractHttpHandlerIntegrationTes
 		Flux<String> result = webClient
 				.post()
 				.uri("/transferTo")
-				.syncBody(generateBody())
+				.body(generateBody())
 				.retrieve()
 				.bodyToFlux(String.class);
 
@@ -183,7 +183,7 @@ public class MultipartIntegrationTests extends AbstractHttpHandlerIntegrationTes
 		Mono<String> result = webClient
 				.post()
 				.uri("/modelAttribute")
-				.syncBody(generateBody())
+				.body(generateBody())
 				.retrieve()
 				.bodyToMono(String.class);
 
diff --git a/spring-webflux/src/test/kotlin/org/springframework/web/reactive/function/client/WebClientExtensionsTests.kt b/spring-webflux/src/test/kotlin/org/springframework/web/reactive/function/client/WebClientExtensionsTests.kt
index e8e5b9413f..7d3bf3fb74 100644
--- a/spring-webflux/src/test/kotlin/org/springframework/web/reactive/function/client/WebClientExtensionsTests.kt
+++ b/spring-webflux/src/test/kotlin/org/springframework/web/reactive/function/client/WebClientExtensionsTests.kt
@@ -27,6 +27,7 @@ import org.junit.Test
 import org.reactivestreams.Publisher
 import org.springframework.core.ParameterizedTypeReference
 import reactor.core.publisher.Mono
+import java.util.concurrent.CompletableFuture
 
 /**
  * Mock object based tests for [WebClient] Kotlin extensions
@@ -41,9 +42,9 @@ class WebClientExtensionsTests {
 
 
 	@Test
-	fun `RequestBodySpec#body with Publisher and reified type parameters`() {
+	fun `RequestBodySpec#bodyWithType with Publisher and reified type parameters`() {
 		val body = mockk<Publisher<List<Foo>>>()
-		requestBodySpec.body(body)
+		requestBodySpec.bodyWithType(body)
 		verify { requestBodySpec.body(body, object : ParameterizedTypeReference<List<Foo>>() {}) }
 	}
 
@@ -51,8 +52,16 @@ class WebClientExtensionsTests {
 	@FlowPreview
 	fun `RequestBodySpec#body with Flow and reified type parameters`() {
 		val body = mockk<Flow<List<Foo>>>()
-		requestBodySpec.body(body)
-		verify { requestBodySpec.body(ofType<Publisher<List<Foo>>>(), object : ParameterizedTypeReference<List<Foo>>() {}) }
+		requestBodySpec.bodyWithType(body)
+		verify { requestBodySpec.body(ofType<Any>(), object : ParameterizedTypeReference<List<Foo>>() {}) }
+	}
+
+	@Test
+	@FlowPreview
+	fun `RequestBodySpec#body with CompletableFuture and reified type parameters`() {
+		val body = mockk<CompletableFuture<List<Foo>>>()
+		requestBodySpec.bodyWithType<List<Foo>>(body)
+		verify { requestBodySpec.body(ofType<Any>(), object : ParameterizedTypeReference<List<Foo>>() {}) }
 	}
 
 	@Test
@@ -83,19 +92,6 @@ class WebClientExtensionsTests {
 		}
 	}
 
-	@Test
-	fun body() {
-		val headerSpec = mockk<WebClient.RequestHeadersSpec<*>>()
-		val supplier: suspend () -> String = mockk()
-		every { requestBodySpec.body(ofType<Mono<String>>()) } returns headerSpec
-		runBlocking {
-			requestBodySpec.body(supplier)
-		}
-		verify {
-			requestBodySpec.body(ofType<Mono<String>>())
-		}
-	}
-
 	@Test
 	fun awaitBody() {
 		val spec = mockk<WebClient.ResponseSpec>()
diff --git a/spring-webflux/src/test/kotlin/org/springframework/web/reactive/function/server/ServerResponseExtensionsTests.kt b/spring-webflux/src/test/kotlin/org/springframework/web/reactive/function/server/ServerResponseExtensionsTests.kt
index b8b8882b9e..00525f3e32 100644
--- a/spring-webflux/src/test/kotlin/org/springframework/web/reactive/function/server/ServerResponseExtensionsTests.kt
+++ b/spring-webflux/src/test/kotlin/org/springframework/web/reactive/function/server/ServerResponseExtensionsTests.kt
@@ -19,6 +19,7 @@ package org.springframework.web.reactive.function.server
 import io.mockk.every
 import io.mockk.mockk
 import io.mockk.verify
+import io.reactivex.Flowable
 import kotlinx.coroutines.FlowPreview
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.runBlocking
@@ -28,12 +29,14 @@ import org.reactivestreams.Publisher
 import org.springframework.core.ParameterizedTypeReference
 import org.springframework.http.MediaType.*
 import reactor.core.publisher.Mono
+import java.util.concurrent.CompletableFuture
 
 /**
  * Mock object based tests for [ServerResponse] Kotlin extensions
  *
  * @author Sebastien Deleuze
  */
+@Suppress("UnassignedFluxMonoInstance")
 class ServerResponseExtensionsTests {
 
 	private val bodyBuilder = mockk<ServerResponse.BodyBuilder>(relaxed = true)
@@ -42,10 +45,51 @@ class ServerResponseExtensionsTests {
 	@Test
 	fun `BodyBuilder#body with Publisher and reified type parameters`() {
 		val body = mockk<Publisher<List<Foo>>>()
-		bodyBuilder.body(body)
+		bodyBuilder.bodyWithType(body)
 		verify { bodyBuilder.body(body, object : ParameterizedTypeReference<List<Foo>>() {}) }
 	}
 
+	@Test
+	fun `BodyBuilder#body with CompletableFuture and reified type parameters`() {
+		val body = mockk<CompletableFuture<List<Foo>>>()
+		bodyBuilder.bodyWithType<List<Foo>>(body)
+		verify { bodyBuilder.body(body, object : ParameterizedTypeReference<List<Foo>>() {}) }
+	}
+
+	@Test
+	fun `BodyBuilder#body with Flowable and reified type parameters`() {
+		val body = mockk<Flowable<List<Foo>>>()
+		bodyBuilder.bodyWithType(body)
+		verify { bodyBuilder.body(body, object : ParameterizedTypeReference<List<Foo>>() {}) }
+	}
+
+	@Test
+	fun `BodyBuilder#bodyAndAwait with object parameter`() {
+		val response = mockk<ServerResponse>()
+		val body = "foo"
+		every { bodyBuilder.body(ofType<String>()) } returns Mono.just(response)
+		runBlocking {
+			bodyBuilder.bodyAndAwait(body)
+		}
+		verify {
+			bodyBuilder.body(ofType<String>())
+		}
+	}
+
+	@Test
+	@FlowPreview
+	fun `BodyBuilder#bodyAndAwait with flow parameter`() {
+		val response = mockk<ServerResponse>()
+		val body = mockk<Flow<List<Foo>>>()
+		every { bodyBuilder.body(ofType<Flow<List<Foo>>>(), object : ParameterizedTypeReference<List<Foo>>() {}) } returns Mono.just(response)
+		runBlocking {
+			bodyBuilder.bodyAndAwait(body)
+		}
+		verify {
+			bodyBuilder.body(ofType<Flow<List<Foo>>>(), object : ParameterizedTypeReference<List<Foo>>() {})
+		}
+	}
+
 	@Test
 	fun `BodyBuilder#json`() {
 		bodyBuilder.json()
@@ -71,42 +115,7 @@ class ServerResponseExtensionsTests {
 	}
 
 	@Test
-	fun await() {
-		val response = mockk<ServerResponse>()
-		val builder = mockk<ServerResponse.HeadersBuilder<*>>()
-		every { builder.build() } returns Mono.just(response)
-		runBlocking {
-			assertEquals(response, builder.buildAndAwait())
-		}
-	}
-
-	@Test
-	fun `bodyAndAwait with object parameter`() {
-		val response = mockk<ServerResponse>()
-		val body = "foo"
-		every { bodyBuilder.syncBody(ofType<String>()) } returns Mono.just(response)
-		runBlocking {
-			bodyBuilder.bodyAndAwait(body)
-		}
-		verify {
-			bodyBuilder.syncBody(ofType<String>())
-		}
-	}
-
-	@Test
-	@FlowPreview
-	fun bodyFlowAndAwait() {
-		val response = mockk<ServerResponse>()
-		val body = mockk<Flow<List<Foo>>>()
-		every { bodyBuilder.body(ofType<Publisher<List<Foo>>>()) } returns Mono.just(response)
-		runBlocking {
-			bodyBuilder.bodyFlowAndAwait(body)
-		}
-		verify { bodyBuilder.body(ofType<Publisher<List<Foo>>>(), object : ParameterizedTypeReference<List<Foo>>() {}) }
-	}
-
-	@Test
-	fun `renderAndAwait with a vararg parameter`() {
+	fun `BodyBuilder#renderAndAwait with a vararg parameter`() {
 		val response = mockk<ServerResponse>()
 		every { bodyBuilder.render("foo", any(), any()) } returns Mono.just(response)
 		runBlocking {
@@ -118,7 +127,7 @@ class ServerResponseExtensionsTests {
 	}
 
 	@Test
-	fun `renderAndAwait with a Map parameter`() {
+	fun `BodyBuilder#renderAndAwait with a Map parameter`() {
 		val response = mockk<ServerResponse>()
 		val map = mockk<Map<String, *>>()
 		every { bodyBuilder.render("foo", map) } returns Mono.just(response)
@@ -130,5 +139,15 @@ class ServerResponseExtensionsTests {
 		}
 	}
 
+	@Test
+	fun `HeadersBuilder#buildAndAwait`() {
+		val response = mockk<ServerResponse>()
+		val builder = mockk<ServerResponse.HeadersBuilder<*>>()
+		every { builder.build() } returns Mono.just(response)
+		runBlocking {
+			assertEquals(response, builder.buildAndAwait())
+		}
+	}
+
 	class Foo
 }
diff --git a/src/docs/asciidoc/web/webflux-webclient.adoc b/src/docs/asciidoc/web/webflux-webclient.adoc
index 7050c1cacf..f45c0dadd6 100644
--- a/src/docs/asciidoc/web/webflux-webclient.adoc
+++ b/src/docs/asciidoc/web/webflux-webclient.adoc
@@ -318,7 +318,8 @@ is closed and is not placed back in the pool.
 [[webflux-client-body]]
 == Request Body
 
-The request body can be encoded from an `Object`, as the following example shows:
+The request body can be encoded from any asynchronous type handled by `ReactiveAdapterRegistry`,
+like `Mono` as the following example shows:
 
 [source,java,intent=0]
 [subs="verbatim,quotes"]
@@ -348,7 +349,7 @@ You can also have a stream of objects be encoded, as the following example shows
 			.bodyToMono(Void.class);
 ----
 
-Alternatively, if you have the actual value, you can use the `syncBody` shortcut method,
+Alternatively, if you have the actual value, you can use the `body` shortcut method,
 as the following example shows:
 
 [source,java,intent=0]
@@ -359,7 +360,7 @@ as the following example shows:
 	Mono<Void> result = client.post()
 			.uri("/persons/{id}", id)
 			.contentType(MediaType.APPLICATION_JSON)
-			.syncBody(person)
+			.body(person)
 			.retrieve()
 			.bodyToMono(Void.class);
 ----
@@ -380,7 +381,7 @@ content is automatically set to `application/x-www-form-urlencoded` by the
 
 	Mono<Void> result = client.post()
 			.uri("/path", id)
-			.syncBody(formData)
+			.body(formData)
 			.retrieve()
 			.bodyToMono(Void.class);
 ----
@@ -428,7 +429,7 @@ explicitly provide the `MediaType` to use for each part through one of the overl
 builder `part` methods.
 
 Once a `MultiValueMap` is prepared, the easiest way to pass it to the the `WebClient` is
-through the `syncBody` method, as the following example shows:
+through the `body` method, as the following example shows:
 
 [source,java,intent=0]
 [subs="verbatim,quotes"]
@@ -437,7 +438,7 @@ through the `syncBody` method, as the following example shows:
 
 	Mono<Void> result = client.post()
 			.uri("/path", id)
-			.syncBody(builder.build())
+			.body(builder.build())
 			.retrieve()
 			.bodyToMono(Void.class);
 ----