diff --git a/common/changes/@autorest/openapi-to-typespec/bodyrootFix_2024-10-24-11-57.json b/common/changes/@autorest/openapi-to-typespec/bodyrootFix_2024-10-24-11-57.json
new file mode 100644
index 0000000000..b80a880f5a
--- /dev/null
+++ b/common/changes/@autorest/openapi-to-typespec/bodyrootFix_2024-10-24-11-57.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@autorest/openapi-to-typespec",
+      "comment": "Change @body to @bodyRoot",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@autorest/openapi-to-typespec"
+}
\ No newline at end of file
diff --git a/packages/extensions/openapi-to-typespec/src/generate/generate-operations.ts b/packages/extensions/openapi-to-typespec/src/generate/generate-operations.ts
index ff2bde24bf..633693c0c3 100644
--- a/packages/extensions/openapi-to-typespec/src/generate/generate-operations.ts
+++ b/packages/extensions/openapi-to-typespec/src/generate/generate-operations.ts
@@ -81,7 +81,7 @@ export function generateProviderAction(operation: TspArmProviderActionOperation)
   const responses = [...new Set(operation.responses)];
   // Workaround for array response, refactor later.
   const response =
-    responses.length === 1 && responses[0].endsWith("[]") ? `{@body _: ${responses[0]}}` : responses.join("|");
+    responses.length === 1 && responses[0].endsWith("[]") ? `{@bodyRoot _: ${responses[0]}}` : responses.join("|");
   if (response !== "void") {
     templateParameters.push(`Response = ${response}`);
   }
diff --git a/packages/extensions/openapi-to-typespec/src/transforms/transform-arm-resources.ts b/packages/extensions/openapi-to-typespec/src/transforms/transform-arm-resources.ts
index 804a83b138..712c071f3b 100644
--- a/packages/extensions/openapi-to-typespec/src/transforms/transform-arm-resources.ts
+++ b/packages/extensions/openapi-to-typespec/src/transforms/transform-arm-resources.ts
@@ -310,7 +310,7 @@ function convertResourceCreateOrReplaceOperation(
       if (acceptedResponse) {
         let responseParameter = `ArmResourceCreatedResponse<${resourceMetadata.SwaggerModelName}> | ArmResourceUpdatedResponse<${resourceMetadata.SwaggerModelName}>`;
         if (isResponseSchema(acceptedResponse) && acceptedResponse.schema) {
-          responseParameter += `| (ArmAcceptedLroResponse & {@body _: ${resourceMetadata.SwaggerModelName};})`;
+          responseParameter += `| (ArmAcceptedLroResponse & {@bodyRoot _: ${resourceMetadata.SwaggerModelName};})`;
         } else responseParameter += `| ArmAcceptedLroResponse`;
         templateParameters.push(`Response = ${responseParameter}`);
         suppressions = getSuppressionsForArmResourceCreateOrReplaceAsync();
diff --git a/packages/extensions/openapi-to-typespec/test/arm-analysisservices/tsp-output/AnalysisServicesServer.tsp b/packages/extensions/openapi-to-typespec/test/arm-analysisservices/tsp-output/AnalysisServicesServer.tsp
index 908db7a5af..b6fc91bcc1 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-analysisservices/tsp-output/AnalysisServicesServer.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-analysisservices/tsp-output/AnalysisServicesServer.tsp
@@ -42,7 +42,7 @@ interface AnalysisServicesServersOperationGroup {
   create is ArmResourceCreateOrReplaceAsync<
     AnalysisServicesServer,
     Response = ArmResourceCreatedResponse<AnalysisServicesServer> | ArmResourceUpdatedResponse<AnalysisServicesServer> | (ArmAcceptedLroResponse & {
-      @body _: AnalysisServicesServer;
+      @bodyRoot _: AnalysisServicesServer;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Disk.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Disk.tsp
index 67a42713c5..3cb3c32747 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Disk.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Disk.tsp
@@ -64,7 +64,7 @@ interface Disks {
   createOrUpdate is ArmResourceCreateOrReplaceAsync<
     Disk,
     Response = ArmResourceCreatedResponse<Disk> | ArmResourceUpdatedResponse<Disk> | (ArmAcceptedLroResponse & {
-      @body _: Disk;
+      @bodyRoot _: Disk;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/DiskAccess.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/DiskAccess.tsp
index 8d76c5805f..e04e445308 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/DiskAccess.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/DiskAccess.tsp
@@ -43,7 +43,7 @@ interface DiskAccesses {
   createOrUpdate is ArmResourceCreateOrReplaceAsync<
     DiskAccess,
     Response = ArmResourceCreatedResponse<DiskAccess> | ArmResourceUpdatedResponse<DiskAccess> | (ArmAcceptedLroResponse & {
-      @body _: DiskAccess;
+      @bodyRoot _: DiskAccess;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/DiskEncryptionSet.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/DiskEncryptionSet.tsp
index d98ffeb847..9cf9505900 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/DiskEncryptionSet.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/DiskEncryptionSet.tsp
@@ -43,7 +43,7 @@ interface DiskEncryptionSets {
   createOrUpdate is ArmResourceCreateOrReplaceAsync<
     DiskEncryptionSet,
     Response = ArmResourceCreatedResponse<DiskEncryptionSet> | ArmResourceUpdatedResponse<DiskEncryptionSet> | (ArmAcceptedLroResponse & {
-      @body _: DiskEncryptionSet;
+      @bodyRoot _: DiskEncryptionSet;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Gallery.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Gallery.tsp
index ec3dcbd4b1..abdf63675c 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Gallery.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Gallery.tsp
@@ -52,7 +52,7 @@ interface Galleries {
   createOrUpdate is ArmResourceCreateOrReplaceAsync<
     Gallery,
     Response = ArmResourceCreatedResponse<Gallery> | ArmResourceUpdatedResponse<Gallery> | (ArmAcceptedLroResponse & {
-      @body _: Gallery;
+      @bodyRoot _: Gallery;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryApplication.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryApplication.tsp
index 44575ceebf..7da394a558 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryApplication.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryApplication.tsp
@@ -40,7 +40,7 @@ interface GalleryApplications {
   createOrUpdate is ArmResourceCreateOrReplaceAsync<
     GalleryApplication,
     Response = ArmResourceCreatedResponse<GalleryApplication> | ArmResourceUpdatedResponse<GalleryApplication> | (ArmAcceptedLroResponse & {
-      @body _: GalleryApplication;
+      @bodyRoot _: GalleryApplication;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryApplicationVersion.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryApplicationVersion.tsp
index 46b8f76335..6c48666a53 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryApplicationVersion.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryApplicationVersion.tsp
@@ -49,7 +49,7 @@ interface GalleryApplicationVersions {
   createOrUpdate is ArmResourceCreateOrReplaceAsync<
     GalleryApplicationVersion,
     Response = ArmResourceCreatedResponse<GalleryApplicationVersion> | ArmResourceUpdatedResponse<GalleryApplicationVersion> | (ArmAcceptedLroResponse & {
-      @body _: GalleryApplicationVersion;
+      @bodyRoot _: GalleryApplicationVersion;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryImage.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryImage.tsp
index 7fcd78e855..124740b1e2 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryImage.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryImage.tsp
@@ -40,7 +40,7 @@ interface GalleryImages {
   createOrUpdate is ArmResourceCreateOrReplaceAsync<
     GalleryImage,
     Response = ArmResourceCreatedResponse<GalleryImage> | ArmResourceUpdatedResponse<GalleryImage> | (ArmAcceptedLroResponse & {
-      @body _: GalleryImage;
+      @bodyRoot _: GalleryImage;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryImageVersion.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryImageVersion.tsp
index a68c8efa34..5b68407884 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryImageVersion.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/GalleryImageVersion.tsp
@@ -49,7 +49,7 @@ interface GalleryImageVersions {
   createOrUpdate is ArmResourceCreateOrReplaceAsync<
     GalleryImageVersion,
     Response = ArmResourceCreatedResponse<GalleryImageVersion> | ArmResourceUpdatedResponse<GalleryImageVersion> | (ArmAcceptedLroResponse & {
-      @body _: GalleryImageVersion;
+      @bodyRoot _: GalleryImageVersion;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/PrivateEndpointConnection.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/PrivateEndpointConnection.tsp
index e895982427..a5435ea896 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/PrivateEndpointConnection.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/PrivateEndpointConnection.tsp
@@ -56,7 +56,7 @@ interface PrivateEndpointConnections {
   updateAPrivateEndpointConnection is ArmResourceCreateOrReplaceAsync<
     PrivateEndpointConnection,
     Response = ArmResourceCreatedResponse<PrivateEndpointConnection> | ArmResourceUpdatedResponse<PrivateEndpointConnection> | (ArmAcceptedLroResponse & {
-      @body _: PrivateEndpointConnection;
+      @bodyRoot _: PrivateEndpointConnection;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Snapshot.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Snapshot.tsp
index a941af0266..dd95da6a50 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Snapshot.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/Snapshot.tsp
@@ -53,7 +53,7 @@ interface Snapshots {
   createOrUpdate is ArmResourceCreateOrReplaceAsync<
     Snapshot,
     Response = ArmResourceCreatedResponse<Snapshot> | ArmResourceUpdatedResponse<Snapshot> | (ArmAcceptedLroResponse & {
-      @body _: Snapshot;
+      @bodyRoot _: Snapshot;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/VirtualMachineScaleSetVM.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/VirtualMachineScaleSetVM.tsp
index d46d06dbbd..2fa4a2081e 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/VirtualMachineScaleSetVM.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/VirtualMachineScaleSetVM.tsp
@@ -87,7 +87,7 @@ interface VirtualMachineScaleSetVMS {
   update is ArmResourceCreateOrReplaceAsync<
     VirtualMachineScaleSetVM,
     Response = ArmResourceCreatedResponse<VirtualMachineScaleSetVM> | ArmResourceUpdatedResponse<VirtualMachineScaleSetVM> | (ArmAcceptedLroResponse & {
-      @body _: VirtualMachineScaleSetVM;
+      @bodyRoot _: VirtualMachineScaleSetVM;
     })
   >;
 
diff --git a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/routes.tsp b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/routes.tsp
index ed0bbf3841..2fbcf20878 100644
--- a/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/routes.tsp
+++ b/packages/extensions/openapi-to-typespec/test/arm-compute/tsp-output/routes.tsp
@@ -126,7 +126,7 @@ interface VirtualMachineImagesOperations {
   @action("versions")
   list is ArmProviderActionAsync<
     Response = {
-      @body _: VirtualMachineImageResource[];
+      @bodyRoot _: VirtualMachineImageResource[];
     },
     Scope = SubscriptionActionScope,
     Parameters = {
@@ -177,7 +177,7 @@ interface VirtualMachineImagesOperations {
   @action("artifacttypes/vmimage/offers")
   listOffers is ArmProviderActionAsync<
     Response = {
-      @body _: VirtualMachineImageResource[];
+      @bodyRoot _: VirtualMachineImageResource[];
     },
     Scope = SubscriptionActionScope,
     Parameters = {
@@ -200,7 +200,7 @@ interface VirtualMachineImagesOperations {
   @action("publishers")
   listPublishers is ArmProviderActionAsync<
     Response = {
-      @body _: VirtualMachineImageResource[];
+      @bodyRoot _: VirtualMachineImageResource[];
     },
     Scope = SubscriptionActionScope,
     Parameters = LocationParameter
@@ -214,7 +214,7 @@ interface VirtualMachineImagesOperations {
   @action("skus")
   listSkus is ArmProviderActionAsync<
     Response = {
-      @body _: VirtualMachineImageResource[];
+      @bodyRoot _: VirtualMachineImageResource[];
     },
     Scope = SubscriptionActionScope,
     Parameters = {
@@ -313,7 +313,7 @@ interface VirtualMachineImagesEdgeZoneOperations {
   @action("versions")
   list is ArmProviderActionAsync<
     Response = {
-      @body _: VirtualMachineImageResource[];
+      @bodyRoot _: VirtualMachineImageResource[];
     },
     Scope = SubscriptionActionScope,
     Parameters = {
@@ -375,7 +375,7 @@ interface VirtualMachineImagesEdgeZoneOperations {
   @action("artifacttypes/vmimage/offers")
   listOffers is ArmProviderActionAsync<
     Response = {
-      @body _: VirtualMachineImageResource[];
+      @bodyRoot _: VirtualMachineImageResource[];
     },
     Scope = SubscriptionActionScope,
     Parameters = {
@@ -405,7 +405,7 @@ interface VirtualMachineImagesEdgeZoneOperations {
   @action("publishers")
   listPublishers is ArmProviderActionAsync<
     Response = {
-      @body _: VirtualMachineImageResource[];
+      @bodyRoot _: VirtualMachineImageResource[];
     },
     Scope = SubscriptionActionScope,
     Parameters = {
@@ -428,7 +428,7 @@ interface VirtualMachineImagesEdgeZoneOperations {
   @action("skus")
   listSkus is ArmProviderActionAsync<
     Response = {
-      @body _: VirtualMachineImageResource[];
+      @bodyRoot _: VirtualMachineImageResource[];
     },
     Scope = SubscriptionActionScope,
     Parameters = {