Long before the The Hangover franchise became a worldwide phenomenon, the film's four stars were struggling actors just trying to make a name for themselves in Hollywood.
Check out Bradley in in his Wet Hot American Summer love scene back in 2001:
Or Zach doing standup comedy, appearing on VH1 and acting in scenes from all the other forgotten shows he did during his climb to success:
Zach also played a stoner named Bobby on the television show Boston Common between 1996 and 1997. Check out the comedian in the below video starting at the 14:20 mark:
Ed had a part in the forgettable TV show Cheap Seats: Without Ron Parker in 2004 (luckily, that same year he also had an appearance on the season 2 premiere of Arrested Development as a real estate agent):
And last, but certainly not least, Justin rapped Sir Mix-A-Lot's song "Baby Got Back" in a scene with Ben Affleck in the 2003 bomb Gigli:
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