diff --git a/.github/header-checker-lint.yml b/.github/header-checker-lint.yml
index 670299df..6d78e84b 100644
--- a/.github/header-checker-lint.yml
+++ b/.github/header-checker-lint.yml
@@ -17,6 +17,7 @@ ignoreFiles:
   - ".github/header-checker-lint.yml"
   - ".github/sync-repo-settings.yaml"
   - ".github/workflows/docs.yml"
+  - ".github/workflows/labeler.yml"
   - ".kokoro/**"
   - "**/requirements.txt"
   - "**/requirements*.txt"
diff --git a/.github/workflows/labeler.yml b/.github/workflows/labeler.yml
new file mode 100644
index 00000000..93a5b4b5
--- /dev/null
+++ b/.github/workflows/labeler.yml
@@ -0,0 +1,25 @@
+name: Add Default P0 Label to Issues and PRs
+
+on:
+  issues:
+    types: [opened]
+  pull_request:
+    types: [opened]
+
+jobs:
+  add-p0-label:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - name: Add P0 label
+        uses: actions/github-script@v7
+        with:
+          script: |
+            github.rest.issues.addLabels({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              labels: ['priority: p0']
+            })