diff --git a/aws-lambda-java-events/README.md b/aws-lambda-java-events/README.md
index 43c25d76..a7ce2c24 100644
--- a/aws-lambda-java-events/README.md
+++ b/aws-lambda-java-events/README.md
@@ -23,6 +23,7 @@
 * `CognitoEvent`
 * `CognitoUserPoolCreateAuthChallengeEvent`
 * `CognitoUserPoolCustomMessageEvent`
+* `CognitoUserPoolCustomSMSSenderEvent`
 * `CognitoUserPoolDefineAuthChallengeEvent`
 * `CognitoUserPoolEvent`
 * `CognitoUserPoolMigrateUserEvent`
diff --git a/aws-lambda-java-events/src/main/java/com/amazonaws/services/lambda/runtime/events/CognitoUserPoolCustomSMSSenderEvent.java b/aws-lambda-java-events/src/main/java/com/amazonaws/services/lambda/runtime/events/CognitoUserPoolCustomSMSSenderEvent.java
new file mode 100644
index 00000000..71d4df5d
--- /dev/null
+++ b/aws-lambda-java-events/src/main/java/com/amazonaws/services/lambda/runtime/events/CognitoUserPoolCustomSMSSenderEvent.java
@@ -0,0 +1,77 @@
+/* Copyright 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved. */
+
+package com.amazonaws.services.lambda.runtime.events;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import lombok.ToString;
+
+import java.util.Map;
+
+/**
+ * Represent the class for the Cognito User Pool Custom SMS Sender Lambda Trigger
+ *
+ * See <a href="https://docs.aws.amazon.com/cognito/latest/developerguide/user-pool-lambda-custom-sms-sender.html">Custom SMS Sender Lambda Trigger</a>
+ *
+ *
+ * @author Saath Satheeshkumar <saths008>
+ */
+@Data
+@EqualsAndHashCode(callSuper = true)
+@NoArgsConstructor
+@ToString(callSuper = true)
+public class CognitoUserPoolCustomSMSSenderEvent extends CognitoUserPoolEvent {
+    /**
+     * The request from the Amazon Cognito service.
+     */
+    private Request request;
+
+    /**
+     * The response from your Lambda trigger.
+     */
+    private Response response;
+
+    @Builder(setterPrefix = "with")
+    public CognitoUserPoolCustomSMSSenderEvent(
+            String version,
+            String triggerSource,
+            String region,
+            String userPoolId,
+            String userName,
+            CallerContext callerContext,
+            Request request,
+            Response response) {
+        super(version, triggerSource, region, userPoolId, userName, callerContext);
+        this.request = request;
+        this.response = response;
+    }
+
+    @Data
+    @EqualsAndHashCode(callSuper = true)
+    @NoArgsConstructor
+    @ToString(callSuper = true)
+    public static class Request extends CognitoUserPoolEvent.Request {
+
+        private String code;
+        private String type;
+        private Map<String, String> clientMetadata;
+
+        @Builder(setterPrefix = "with")
+        public Request(Map<String, String> userAttributes, String code, String type, Map<String, String> clientMetadata) {
+            super(userAttributes);
+            this.code = code;
+            this.type = type;
+            this.clientMetadata = clientMetadata;
+        }
+    }
+
+    @Data
+    @AllArgsConstructor
+    @Builder(setterPrefix = "with")
+    @NoArgsConstructor
+    public static class Response {
+    }
+}