diff --git a/actions/setup/js/close_expired_discussions.cjs b/actions/setup/js/close_expired_discussions.cjs
index 4e77937ed4..f41d62a0c8 100644
--- a/actions/setup/js/close_expired_discussions.cjs
+++ b/actions/setup/js/close_expired_discussions.cjs
@@ -180,10 +180,10 @@ async function closeDiscussionAsOutdated(github, discussionId) {
 }
 
 /**
- * Check if a discussion already has an expiration comment
+ * Check if a discussion already has an expiration comment and fetch its closed state
  * @param {any} github - GitHub GraphQL instance
  * @param {string} discussionId - Discussion node ID
- * @returns {Promise<boolean>} True if expiration comment exists
+ * @returns {Promise<{hasComment: boolean, isClosed: boolean}>} Object with comment existence and closed state
  */
 async function hasExpirationComment(github, discussionId) {
   const result = await github.graphql(
@@ -191,6 +191,7 @@ async function hasExpirationComment(github, discussionId) {
     query($dId: ID!) {
       node(id: $dId) {
         ... on Discussion {
+          closed
           comments(first: 100) {
             nodes {
               body
@@ -202,14 +203,16 @@ async function hasExpirationComment(github, discussionId) {
     { dId: discussionId }
   );
 
-  if (!result || !result.node || !result.node.comments) {
-    return false;
+  if (!result || !result.node) {
+    return { hasComment: false, isClosed: false };
   }
 
-  const comments = result.node.comments.nodes || [];
+  const isClosed = result.node.closed || false;
+  const comments = result.node.comments?.nodes || [];
   const expirationCommentPattern = /<!--\s*gh-aw-closed\s*-->/;
+  const hasComment = comments.some(comment => comment.body && expirationCommentPattern.test(comment.body));
 
-  return comments.some(comment => comment.body && expirationCommentPattern.test(comment.body));
+  return { hasComment, isClosed };
 }
 
 async function main() {
@@ -323,9 +326,20 @@ async function main() {
     core.info(`[${i + 1}/${discussionsToClose.length}] Processing discussion #${discussion.number}: ${discussion.url}`);
 
     try {
-      // Check if an expiration comment already exists
-      core.info(`  Checking for existing expiration comment on discussion #${discussion.number}`);
-      const hasComment = await hasExpirationComment(github, discussion.id);
+      // Check if an expiration comment already exists and if discussion is closed
+      core.info(`  Checking for existing expiration comment and closed state on discussion #${discussion.number}`);
+      const { hasComment, isClosed } = await hasExpirationComment(github, discussion.id);
+
+      if (isClosed) {
+        core.warning(`  Discussion #${discussion.number} is already closed, skipping`);
+        skippedDiscussions.push({
+          number: discussion.number,
+          url: discussion.url,
+          title: discussion.title,
+        });
+        skippedCount++;
+        continue;
+      }
 
       if (hasComment) {
         core.warning(`  Discussion #${discussion.number} already has an expiration comment, skipping to avoid duplicate`);
diff --git a/actions/setup/js/close_expired_discussions.test.cjs b/actions/setup/js/close_expired_discussions.test.cjs
index 8d2d65beb0..3534b0f5a9 100644
--- a/actions/setup/js/close_expired_discussions.test.cjs
+++ b/actions/setup/js/close_expired_discussions.test.cjs
@@ -93,9 +93,10 @@ describe("close_expired_discussions", () => {
             },
           },
         })
-        // Second call: hasExpirationComment - returns true (comment exists)
+        // Second call: hasExpirationComment - returns true (comment exists) and not closed
         .mockResolvedValueOnce({
           node: {
+            closed: false,
             comments: {
               nodes: [{ body: "This discussion was automatically closed because it expired on 2020-01-20T09:20:00.000Z.\n\n<!-- gh-aw-closed -->" }],
             },
@@ -123,6 +124,55 @@ describe("close_expired_discussions", () => {
       expect(mockCore.info).toHaveBeenCalledWith(expect.stringContaining("Attempting to close discussion"));
     });
 
+    it("should skip already closed discussions entirely", async () => {
+      const module = await import("./close_expired_discussions.cjs");
+
+      // Mock the search query to return an open discussion with expiration marker
+      mockGithub.graphql
+        // First call: searchDiscussionsWithExpiration
+        .mockResolvedValueOnce({
+          repository: {
+            discussions: {
+              pageInfo: {
+                hasNextPage: false,
+                endCursor: null,
+              },
+              nodes: [
+                {
+                  id: "D_closed123",
+                  number: 11060,
+                  title: "Already Closed Discussion",
+                  url: "https://github.com/testowner/testrepo/discussions/11060",
+                  body: "> AI generated by Test Workflow\n>\n> - [x] expires <!-- gh-aw-expires: 2020-01-20T09:20:00.000Z --> on Jan 20, 2020, 9:20 AM UTC",
+                  createdAt: "2020-01-19T09:20:00.000Z",
+                },
+              ],
+            },
+          },
+        })
+        // Second call: hasExpirationComment - returns discussion is closed
+        .mockResolvedValueOnce({
+          node: {
+            closed: true,
+            comments: {
+              nodes: [{ body: "This discussion was automatically closed because it expired on 2020-01-20T09:20:00.000Z.\n\n<!-- gh-aw-closed -->" }],
+            },
+          },
+        });
+
+      await module.main();
+
+      // Verify that we only made 2 graphql calls (search and check closed state)
+      // Should NOT attempt to close or add comment
+      expect(mockGithub.graphql).toHaveBeenCalledTimes(2);
+
+      // Verify that we detected the discussion was already closed
+      expect(mockCore.warning).toHaveBeenCalledWith(expect.stringContaining("is already closed"));
+
+      // Verify that we did NOT try to close the discussion
+      expect(mockCore.info).not.toHaveBeenCalledWith(expect.stringContaining("Attempting to close discussion"));
+    });
+
     it("should add comment if none exists", async () => {
       const module = await import("./close_expired_discussions.cjs");
 
@@ -149,9 +199,10 @@ describe("close_expired_discussions", () => {
             },
           },
         })
-        // Second call: hasExpirationComment - returns false (no comment exists)
+        // Second call: hasExpirationComment - returns false (no comment exists) and not closed
         .mockResolvedValueOnce({
           node: {
+            closed: false,
             comments: {
               nodes: [{ body: "Some unrelated comment" }],
             },
@@ -213,9 +264,10 @@ describe("close_expired_discussions", () => {
             },
           },
         })
-        // Second call: hasExpirationComment - empty comments
+        // Second call: hasExpirationComment - empty comments and not closed
         .mockResolvedValueOnce({
           node: {
+            closed: false,
             comments: {
               nodes: [],
             },