The Hangover Part III includes Bradley Cooper, Ed Helms, Zach Galifianakis, Justin Bartha, and Ken Jeong, Jeffrey Tambor, Heather Graham, Mike Epps, Melissa McCarthy and John Goodman.
The Hangover Part III . The film stars Bradley Cooper , Ed Helms , Zach Galifianakis , Justin Bartha , and Ken Jeong . The supporting cast includes Jeffrey Tambor , Heather Graham , Mike Epps , Melissa McCarthy and John Goodman with Todd Phillips directing a screenplay written by himself and Craig Mazin .