diff --git a/.github/workflows/auto_pr_creation_rdke_manifest.yml b/.github/workflows/auto_pr_creation_rdke_manifest.yml
new file mode 100644
index 0000000..0ea1022
--- /dev/null
+++ b/.github/workflows/auto_pr_creation_rdke_manifest.yml
@@ -0,0 +1,60 @@
+name: Update Manifests on Sub-manifest Repo Merge
+
+on:
+  workflow_call:
+    secrets:
+      RDKCM_RDKE:
+        required: true
+
+jobs:
+  auto_pr_creation_rdke_manifest:
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.merged == true
+    steps:
+      - name: Checkout build_tools_workflows code
+        uses: actions/checkout@v4
+        with:
+          repository: rdkcentral/build_tools_workflows
+          path: 'tools'
+          ref: develop
+          token: ${{ secrets.RDKCM_RDKE }}
+
+      - name: Checkout Manifest Repository
+        uses: actions/checkout@v4
+        with:
+          repository: 'rdkcentral/middleware-manifest-rdke'
+          path: 'manifest_repo'
+          ref: develop
+          token: ${{ secrets.RDKCM_RDKE }}
+
+      - name: Update Git Config
+        env:
+          BOT_EMAIL: ${{ vars.RDKM_BOT_EMAIL }}
+        run: |
+            cd manifest_repo
+            git config user.name "bot"
+            git config user.email "$BOT_EMAIL"
+            cd ..
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.x'
+
+      - name: Install Python dependencies
+        run: |
+          python3 -m pip install --upgrade pip
+          pip install requests PyGithub GitPython
+
+      - name: Run the update script
+        env:
+          GITHUB_TOKEN: ${{ secrets.RDKCM_RDKE }}
+          GITHUB_ORG: 'rdkcentral'
+          MANIFEST_REPO_PATH: ${{ github.workspace }}/manifest_repo
+          MANIFEST_REPO_NAME: 'rdkcentral/middleware-manifest-rdke'
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          BASE_BRANCH: ${{ github.event.pull_request.base.ref }}
+        run: |
+            cd manifest_repo
+            python3 ../tools/build_health_check_workflow_scripts/auto_pr_generation_manifest.py
+            cd ..
diff --git a/build_health_check_workflow_scripts/auto_pr_generation_manifest.py b/build_health_check_workflow_scripts/auto_pr_generation_manifest.py
index eda6b65..c384eba 100644
--- a/build_health_check_workflow_scripts/auto_pr_generation_manifest.py
+++ b/build_health_check_workflow_scripts/auto_pr_generation_manifest.py
@@ -146,16 +146,25 @@ def update_xml_files(manifest_repo_path, updates):
 
   for xml_file in xml_files:
     xml_path = os.path.join(manifest_repo_path, xml_file)
+    print("Checking {}".format(xml_file))
     tree = ET.parse(xml_path)
     root = tree.getroot()
     file_changed = False
 
     for project in root.findall('project'):
+      print("Checking projects {}".format(project.get('name')))
       if project.get('name') in updates and project.get('revision') != updates[project.get('name')]:
         print("Updating {}: {} from {} to {}".format(xml_file, project.get('name'), project.get('revision'), updates[project.get('name')]))
         project.set('revision', updates[project.get('name')])
         file_changed = True
 
+    for submanifest in root.findall('submanifest'):
+      print("Checking submanifests {}".format(submanifest.get('project')))
+      if submanifest.get('project') in updates and submanifest.get('revision') != updates[submanifest.get('project')]:
+        print("Updating {}: {} from {} to {}".format(xml_file, submanifest.get('project'), submanifest.get('revision'), updates[submanifest.get('project')]))
+        submanifest.set('revision', updates[submanifest.get('project')])
+        file_changed = True
+
     if file_changed:
         write_xml(root, xml_path)
         print("Updated {}".format(xml_file))