diff --git a/.github/workflows/tag-release.yml b/.github/workflows/tag-release.yml
index f4cb21a..1038da6 100644
--- a/.github/workflows/tag-release.yml
+++ b/.github/workflows/tag-release.yml
@@ -12,9 +12,14 @@ on:
       sha:
         description: Commit SHA to tag
         required: false
+      pr_number:
+        description: Release PR number to relabel after tagging
+        required: false
 
 permissions:
   contents: write
+  issues: write
+  pull-requests: write
 
 jobs:
   tag:
@@ -63,3 +68,18 @@ jobs:
           git remote set-url origin "https://x-access-token:${PUSH_TOKEN}@github.com/${{ github.repository }}.git"
           git tag "$tag" "$TARGET_SHA"
           git push origin "$tag"
+
+      - name: Mark release PR as tagged
+        if: github.event_name == 'pull_request_target' || github.event.inputs.pr_number != ''
+        env:
+          GH_TOKEN: ${{ secrets.RELEASE_PLEASE_TOKEN || github.token }}
+          PR_NUMBER: ${{ github.event.inputs.pr_number || github.event.pull_request.number }}
+        run: |
+          gh api "repos/${{ github.repository }}/labels" \
+            -X POST \
+            -f name='autorelease: tagged' \
+            -f color='0e8a16' \
+            -f description='Release PR has been tagged' >/dev/null 2>&1 || true
+
+          gh api "repos/${{ github.repository }}/issues/${PR_NUMBER}/labels/autorelease:%20pending" -X DELETE >/dev/null 2>&1 || true
+          gh issue edit "${PR_NUMBER}" --add-label 'autorelease: tagged'