diff --git a/content/en/docs/releasenotes/private-platform/1.21.md b/content/en/docs/releasenotes/private-platform/1.21.md
new file mode 100644
index 00000000000..819c9c28917
--- /dev/null
+++ b/content/en/docs/releasenotes/private-platform/1.21.md
@@ -0,0 +1,74 @@
+---
+title: "1.21"
+url: /releasenotes/private-platform/1-21/
+description: "Release notes for version 1.21 of Private Mendix Platform"
+weight: 40
+---
+
+These release notes cover changes made to the [Private Mendix Platform](/private-mendix-platform/) in version 1.21.
+
+## 1.21.0
+
+### Release date: April 30, 2025
+
+Version 1.21.0 of Private Mendix Platform introduces a number of new features, improvements, and bug fixes.
+
+#### New Features
+
+##### Authentication Supported for CI/CD resources
+
+We have updated all settings for image registries, buckets, and file servers, to support authentication in a consistent way. This includes the following settings:
+
+* Build Images Settings:
+
+    * Build Image registry
+    * Build Package Path file server
+    * MxBuild Image registry
+    * Runtime Base Image registry
+    * OCI registry to save output
+
+* Marketplace Import:
+
+    * Import Bundle file server
+
+We have also added an option to specify if uploading the image registry in the Build pipeline should require authentication.
+
+##### SSO Users Visually Identified on the User Management Page
+
+The **Manage** > **User Management** page now indicates whether a user is local, or enabled through SSO. SSO users are identified with an **SSO** icon on the page.
+
+#### Improvements
+
+##### Improved Pipeline Calls
+
+You can now use REST API to call a completed pipeline.
+
+##### Engineering Improvements
+
+We have updated Private Mendix Platform code to SP 10.18.5.
+
+#### Updates
+
+##### Studio Pro Updates
+
+* Studio Pro 9.24 LTS latest patch version updated to [9.24.34](/releasenotes/studio-pro/9.24/#92434) (production support)
+* Studio Pro 10.6 MTS latest patch version updated to [10.6.22](/releasenotes/studio-pro/10.6/#10621) (innovation track, limited support)
+* Studio Pro 10.12 MTS latest patch version updated to [10.12.16](/releasenotes/studio-pro/10.12/#101216) (innovation track, limited support)
+* Studio Pro 10.18 MTS support has been postponed due to incompatibility issues
+
+##### Other Platform Components
+
+* Mendix for Private Cloud Operator version [2.21.2](/releasenotes/developer-portal/mendix-for-private-cloud/#2.21.2)
+* Private Cloud License Manager (PCLM) version [0.10.2](/releasenotes/developer-portal/mendix-for-private-cloud/#license-manager-cli-v0102)
+* SVIX webhooks service v.1.42.0
+
+#### Fixes
+
+We have provided the following fixes:
+
+* (Platform) We have added additional validation to prevent users from creating Private Platform accounts with the same user name or email as an existing Bitbucket account.
+* (Platform) We have resolved a number of issues related to screen locking.
+* (Platform) We have fixed an issue that occurred when logging in with OICD with custom attribute mapping.
+* (UI) We have fixed an issue where a message about project deletion was displayed after logging out and logging back in.
+* (UI) We have resolved a number of issues related to deep linking.
+* (UI) We have made other, minor UI improvements and fixes.
diff --git a/content/en/docs/releasenotes/private-platform/_index.md b/content/en/docs/releasenotes/private-platform/_index.md
index 428028fe536..4322b733ba5 100644
--- a/content/en/docs/releasenotes/private-platform/_index.md
+++ b/content/en/docs/releasenotes/private-platform/_index.md
@@ -12,6 +12,7 @@ These release notes cover changes made to the [Private Mendix Platform](/private
 
 Release notes are available for the following versions of Private Mendix Platform:
 
+* [1.21](/releasenotes/private-platform/1-21/)
 * [1.20](/releasenotes/private-platform/1-20/)
 * [1.19](/releasenotes/private-platform/1-19/)
 * [1.18](/releasenotes/private-platform/1-18/)