Bradley Cooper as Phil, Ed Helms as Stu and Justin Bartha as Doug in a scene from "The Hangover Part III." | Photo courtesy of Warner Bros. Pictures

"The Hangover Part III" features Ken Jeong as Leslie Chow. | Photo courtesy of Warner Bros. Pictures

Justin Bartha as Doug, Zach Galfianakis as Alan, Ed Helms as Stu and Bradley Cooper as Phil are back in "The Hangover Part III." | Photo courtesy of Warner Bros. Pictures

"The Hangover Part III" features Zach Galifianakis as Alan. | Photo courtesy of Warner Bros. Pictures

John Goodman plays Marshall in "The Hangover Part III." | Photo courtesy of Warner Bros. Pictures

Grant Holmquist (left) as Tyler/Carlos and Zach Galifianakis as Alan in a scene from "The Hangover Part III." | Photo courtesy of Warner Bros. Pictures

Bradley Cooper (from left) as Phil, Zach Galifianakis as Alan and Ed Hlems as Stu in a scene from "The Hangover Part III." | Photo courtesy of Warner Bros. Pictures