The Hangover

The Hangover is a 2009 American comedy film, co-produced and directed by Todd Phillips and written by Jon Lucas and Scott Moore.
It is the first film of The Hangover trilogy.
The film stars Bradley Cooper, Ed Helms, Zach Galifianakis, Heather Graham, Justin Bartha, and Jeffrey Tambor.

The Hangover Part II is a 2011 American comedy film produced by Legendary Pictures and distributed by Warner Bros. Pictures.
It is the sequel to 2009's The Hangover and the second film in The Hangover trilogy.

The Hangover Part III is a 2013 American comedy thriller film produced by Legendary Pictures and distributed by Warner Bros. Pictures.
It is the sequel to 2009's The Hangover and 2011's The Hangover Part II, and the third and final installment of The Hangover trilogy.