diff --git a/CHANGELOG.md b/CHANGELOG.md
index d4553bdd7869..c2607536c325 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+<a name="21.0.0-rc.0"></a>
+
+# 21.0.0-rc.0 (2025-10-30)
+
+<!-- CHANGELOG SPLIT MARKER -->
+
 <a name="21.0.0-next.10"></a>
 
 # 21.0.0-next.10 (2025-10-29)