diff --git a/change/@fluentui-web-components-83c39762-3f94-4384-9c28-f1cb5fc76818.json b/change/@fluentui-web-components-83c39762-3f94-4384-9c28-f1cb5fc76818.json
new file mode 100644
index 0000000000000..4f567eda11753
--- /dev/null
+++ b/change/@fluentui-web-components-83c39762-3f94-4384-9c28-f1cb5fc76818.json
@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Added part for content and actions in fluent-message-bar",
+  "packageName": "@fluentui/web-components",
+  "email": "support@marvinkleinmusic.de",
+  "dependentChangeType": "patch"
+}
diff --git a/packages/web-components/src/message-bar/message-bar.template.ts b/packages/web-components/src/message-bar/message-bar.template.ts
index bc9ed59aafccf..9219079aa90ed 100644
--- a/packages/web-components/src/message-bar/message-bar.template.ts
+++ b/packages/web-components/src/message-bar/message-bar.template.ts
@@ -10,10 +10,10 @@ import type { MessageBar } from './message-bar.js';
 export function messageBarTemplate<T extends MessageBar>(): ElementViewTemplate<T> {
   return html<T>`
     <slot name="icon"></slot>
-    <div class="content">
+    <div class="content" part="content">
       <slot></slot>
     </div>
-    <div class="actions">
+    <div class="actions" part="actions">
       <slot name="actions"></slot>
     </div>
     <slot name="dismiss"></slot>
diff --git a/packages/web-components/src/message-bar/message-bar.ts b/packages/web-components/src/message-bar/message-bar.ts
index 7a3b5f8b0ab7f..931446606818a 100644
--- a/packages/web-components/src/message-bar/message-bar.ts
+++ b/packages/web-components/src/message-bar/message-bar.ts
@@ -9,6 +9,8 @@ import { MessageBarIntent, MessageBarLayout, MessageBarShape } from './message-b
  * @slot actions - Content that can be provided for the actions
  * @slot dismiss - Content that can be provided for the dismiss button
  * @slot - The default slot for the content
+ * @csspart content - The wrapper for the message
+ * @csspart actions - The wrapper for extra action buttons related to the message
  * @public
  */
 export class MessageBar extends FASTElement {