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A documentary that explores the making of The Hangover Trilogy. It includes Zach's unlikely audition as "Alan," the truth behind Ed Helms missing tooth, the casting of a drug-dealing monkey and the wildly improbable rendezvous with a former president.

Director : Joseph Garner

Writer :

Cast

Todd Phillips

Bradley Cooper

Ed Helms

Zach Galifianakis

Daniel Goldberg

Jeremy Garelick