diff --git a/README.md b/README.md
index 724917de..1443e86a 100644
--- a/README.md
+++ b/README.md
@@ -224,6 +224,9 @@ intercom.conversations.reply(id: conversation.id, type: 'admin', admin_id: '123'
 # User (identified by email) replies with a comment and attachment
 intercom.conversations.reply(id: conversation.id, type: 'user', email: 'joe@example.com', message_type: 'comment', body: 'foo', attachment_urls: ['http://www.example.com/attachment.jpg'])
 
+#reply to a user's last conversation
+intercom.conversations.reply_to_last(type: 'user', body: 'Thanks again', message_type: 'comment', user_id: '12345', admin_id: '123')
+
 # Open
 intercom.conversations.open(id: conversation.id, admin_id: '123')
 
@@ -244,6 +247,12 @@ intercom.conversations.reply(id: conversation.id, type: 'admin', admin_id: '123'
 # Reply and Close
 intercom.conversations.reply(id: conversation.id, type: 'admin', admin_id: '123', message_type: 'close', body: 'bar')
 
+# Admin reply to last conversation
+intercom.conversations.reply_to_last(intercom_user_id: '5678', type: 'admin', admin_id: '123', message_type: 'comment', body: 'bar')
+
+# User reply to last conversation
+intercom.conversations.reply_to_last(intercom_user_id: '5678', type: 'user', message_type: 'comment', body: 'bar')
+
 # ASSIGNING CONVERSATIONS TO ADMINS
 intercom.conversations.reply(id: conversation.id, type: 'admin', assignee_id: assignee_admin.id, admin_id: admin.id, message_type: 'assignment')
 
diff --git a/lib/intercom/service/conversation.rb b/lib/intercom/service/conversation.rb
index 40049576..95c4bd2c 100644
--- a/lib/intercom/service/conversation.rb
+++ b/lib/intercom/service/conversation.rb
@@ -29,6 +29,12 @@ def reply(reply_data)
         collection_class.new.from_response(response)
       end
 
+      def reply_to_last(reply_data)
+        collection_name = Utils.resource_class_to_collection_name(collection_class)
+        response = @client.post("/#{collection_name}/last/reply", reply_data)
+        collection_class.new.from_response(response)
+      end
+
       def open(reply_data)
         reply reply_data.merge(message_type: 'open', type: 'admin')
       end
diff --git a/spec/unit/intercom/conversation_spec.rb b/spec/unit/intercom/conversation_spec.rb
index 037ac2bc..0f0c74cf 100644
--- a/spec/unit/intercom/conversation_spec.rb
+++ b/spec/unit/intercom/conversation_spec.rb
@@ -28,6 +28,11 @@
     client.conversations.reply(id: '147', type: 'user', body: 'Thanks again', message_type: 'comment', user_id: 'ac4', attachment_urls: ["http://www.example.com/attachment.jpg"])
   end
 
+  it 'sends a reply to a users last conversation from an admin' do
+    client.expects(:post).with('/conversations/last/reply', { type: 'admin', body: 'Thanks again', message_type: 'comment', user_id: 'ac4', admin_id: '123' }).returns(test_conversation)
+    client.conversations.reply_to_last(type: 'admin', body: 'Thanks again', message_type: 'comment', user_id: 'ac4', admin_id: '123')
+  end
+
   it 'opens a conversation' do
     client.expects(:post).with('/conversations/147/reply', { type: 'admin', message_type: 'open', conversation_id: '147', admin_id: '123'}).returns(test_conversation)
     client.conversations.open(id: '147', admin_id: '123')