diff --git a/format.sh b/format.sh
index 39a44cf2a59c6..78dd2a81c1080 100755
--- a/format.sh
+++ b/format.sh
@@ -287,6 +287,29 @@ else
 fi
 echo 'vLLM clang-format: Done'
 
+echo 'vLLM actionlint:'
+
+DOCKER=""
+if command -v "docker" &>/dev/null; then
+    DOCKER="docker"
+elif command -v "podman" &>/dev/null; then
+    DOCKER="podman"
+else
+    echo "Docker or Podman are not installed. Please install one if you want to lint GitHub CI configuration."
+fi
+
+actionlint() {
+    if [ -z "$DOCKER" ]; then
+        return
+    fi
+    # Ensure we use the same version of actionlint as CI
+    IMAGE="vllm/actionlint:latest"
+    ${DOCKER} build --tag "${IMAGE}" - < .github/workflows/actionlint.dockerfile
+    ${DOCKER} run --volume="${PWD}:/repo:z" --workdir=/repo "${IMAGE}" -color
+}
+
+actionlint
+echo 'vLLM actionlint: Done'
 
 if ! git diff --quiet &>/dev/null; then
     echo 'Reformatted files. Please review and stage the changes.'