diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index b917c7f52d..3f01888f05 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -75,7 +75,7 @@ Changelog
  * Maintenance: Move snippet choosers and model check registration to `SnippetViewSet.on_register()` (Sage Abdullah)
 
 
-4.2.1 (xx.xx.xxxx) - IN DEVELOPMENT
+4.2.1 (13.03.2023)
 ~~~~~~~~~~~~~~~~~~
 
  * Fix: Support creating `StructValue` copies (Tidiane Dia)
diff --git a/docs/releases/4.2.1.md b/docs/releases/4.2.1.md
index a517198fd9..c2a7395d7b 100644
--- a/docs/releases/4.2.1.md
+++ b/docs/releases/4.2.1.md
@@ -1,6 +1,6 @@
-# Wagtail 4.2.1 release notes - IN DEVELOPMENT
+# Wagtail 4.2.1 release notes
 
-_Unreleased_
+_March 13, 2023_
 
 ```{contents}
 ---