The Hangover Part III includes actors.
Bradley Charles Cooper ( born January 5 , 1975 ) is an American actor and producer . Edward Parker Helms ( born January 24 , 1974 ) is an American actor , comedian , and singer . Jeffrey Michael Tambor ( born July 8 , 1944 ) is an American actor , voice artist , and comedian widely known for his roles as Hank Kingsley on The Larry Sanders Show , George Bluth Sr. and Oscar Bluth on Arrested Development , and Maura Pfefferman on Transparent , for which he has received one Golden Globe , one Screen Actors Guild and two Emmy Awards . The Hangover Part III . The film stars Bradley Cooper , Ed Helms , Zach Galifianakis , Justin Bartha , and Ken Jeong .