diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index 03c1347ea..0d9515779 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -1,3 +1,12 @@
+========================================================================
+Amazon CloudWatch Agent Operator v1.9.0 (2024-11-01)
+========================================================================
+Enhancements:
+* Open a port 4311 for agent server when appsignals is enabled
+* Attach service name source as resource attribute to operator
+* Use replicaset name as part of service name fallback
+* [ApplicationSignals] Support runtime metrics for Application Signals
+
 ========================================================================
 Amazon CloudWatch Agent Operator v1.8.0 (2024-10-17)
 ========================================================================