The Hangover (2009)

Director: 

Todd Phillips

Writers: 

Jon Lucas, Scott Moore

Stars:

 Zach Galifianakis, Bradley Cooper and Justin Bartha

Genre: Comedy | Crime

Plot:

A Las Vegas-set comedy centered around three groomsmen who lose their about-to-be-wed buddy during their drunken misadventures, then must retrace their steps in order to find him.