diff --git a/projects/github-actions/repo-gardening/changelog/add-repo-gardening-slack-message-customer-reports b/projects/github-actions/repo-gardening/changelog/add-repo-gardening-slack-message-customer-reports
new file mode 100644
index 0000000000000..03ad960a6fa7e
--- /dev/null
+++ b/projects/github-actions/repo-gardening/changelog/add-repo-gardening-slack-message-customer-reports
@@ -0,0 +1,4 @@
+Significance: patch
+Type: changed
+
+Support References: send Slack message when an issue is labeled as customer report.
diff --git a/projects/github-actions/repo-gardening/src/tasks/gather-support-references/index.js b/projects/github-actions/repo-gardening/src/tasks/gather-support-references/index.js
index 1fe15ebc63b42..17b31aefa24fd 100644
--- a/projects/github-actions/repo-gardening/src/tasks/gather-support-references/index.js
+++ b/projects/github-actions/repo-gardening/src/tasks/gather-support-references/index.js
@@ -412,13 +412,19 @@ async function createOrUpdateComment( payload, octokit, issueReferences, issueCo
 /**
  * Add a label to the issue, if it does not exist yet.
  *
- * @param {GitHub} octokit    - Initialized Octokit REST client.
- * @param {string} ownerLogin - Repository owner login.
- * @param {string} repo       - Repository name.
- * @param {number} number     - Issue number.
+ * @param {WebhookPayloadIssue} payload - Issue or issue comment event payload.
+ * @param {GitHub}              octokit - Initialized Octokit REST client.
  * @return {Promise<void>}
  */
-async function addHappinessLabel( octokit, ownerLogin, repo, number ) {
+async function addHappinessLabel( payload, octokit ) {
+	const {
+		issue: { number },
+		repository: {
+			name: repo,
+			owner: { login: ownerLogin },
+		},
+	} = payload;
+
 	const happinessLabel = 'Customer Report';
 
 	const labels = await getLabels( octokit, ownerLogin, repo, number );
@@ -436,6 +442,18 @@ async function addHappinessLabel( octokit, ownerLogin, repo, number ) {
 		issue_number: number,
 		labels: [ happinessLabel ],
 	} );
+
+	// Send Slack notification, if we have the necessary tokens.
+	// No Slack tokens, we won't be able to escalate. Bail.
+	const slackToken = getInput( 'slack_token' );
+	const channel = getInput( 'slack_quality_channel' );
+	if ( ! slackToken || ! channel ) {
+		return false;
+	}
+
+	const message = `This issue has been labeled as a Customer Report. Please complete first-line triage within 24 hours.`;
+	const slackMessageFormat = formatSlackMessage( payload, channel, message );
+	await sendSlackMessage( message, channel, payload, slackMessageFormat );
 }
 
 /**
@@ -464,7 +482,7 @@ async function gatherSupportReferences( payload, octokit ) {
 	if ( issueReferences.length > 0 ) {
 		debug( `gather-support-references: Found ${ issueReferences.length } references.` );
 		await createOrUpdateComment( payload, octokit, issueReferences, issueComments );
-		await addHappinessLabel( octokit, owner.login, repo, number );
+		await addHappinessLabel( payload, octokit );
 	}
 }
 
diff --git a/projects/github-actions/repo-gardening/src/tasks/gather-support-references/readme.md b/projects/github-actions/repo-gardening/src/tasks/gather-support-references/readme.md
index 16fc1e76945b8..c5878c415d398 100644
--- a/projects/github-actions/repo-gardening/src/tasks/gather-support-references/readme.md
+++ b/projects/github-actions/repo-gardening/src/tasks/gather-support-references/readme.md
@@ -2,7 +2,7 @@
 
 Happiness Engineers can comment on issues to add references to support interactions with customers that would like to be updated whenever the problem is solved.
 
-This task creates a new comment that lists all support references found in all comments on the issue. If it finds a support reference, it will also add a label to the issue, "Customer Report".
+This task creates a new comment that lists all support references found in all comments on the issue. If it finds a support reference, it will also add a label to the issue, "Customer Report". When that label is added, we warn the triage team in Slack.
 
 The tasks also monitors the number of support references it has gathered: