diff --git a/.github/mergify.yml b/.github/mergify.yml
index 5b08dbef8e13..de1a8314a4ec 100644
--- a/.github/mergify.yml
+++ b/.github/mergify.yml
@@ -11,6 +11,8 @@ pull_request_rules:
     label:
       add:
         - documentation
+    comment:
+      message: "Documentation preview: https://vllm--{{number}}.org.readthedocs.build/en/{{number}}/"
 
 - name: label-ci-build
   description: Automatically apply ci/build label