Bradley Cooper at the California premiere of "Hangover Part III."

Bradley Cooper at the California premiere of "Hangover Part III."

Bradley Cooper and director Todd Phillips at the California premiere of "Hangover Part III."

Ed Helms at the California premiere of "Hangover Part III."

Ed Helms at the California premiere of "Hangover Part III."

Heather Graham and Ed Helms at the California premiere of "Hangover Part III."

Zach Galifianakis at the California premiere of "Hangover Part III."

Zach Galifianakis at the California premiere of "Hangover Part III."

Justin Bartha at the California premiere of "Hangover Part III."

Justin Bartha at the California premiere of "Hangover Part III."

Ken Jeong at the California premiere of "Hangover Part III."

Ken Jeong at the California premiere of "Hangover Part III."

Tran Jeong and Ken Jeong at the California premiere of "Hangover Part III."

Heather Graham at the California premiere of "Hangover Part III."

Heather Graham at the California premiere of "Hangover Part III."

Mike Epps at the California premiere of "Hangover Part III."

Mechelle McCain and Mike Epps at the California premiere of "Hangover Part III."

Sasha Barrese at the California premiere of "Hangover Part III."

Sasha Barrese at the California premiere of "Hangover Part III."

Sasha Barrese, Gillian Vigman and Sondra Currie at the California premiere of "Hangover Part III."