VIDEO: Zach Galifianakis Gets Sean Penn 'Between Two Ferns'
Sean Penn must be a big fan of The Hangover, otherwise we're not sure why he agreed to appear on Zach Galifianakis's Funny or Die Web show, Between Two Ferns.
Zach decided to put on a special act for his sit-down interview with Sean.
Appearing as his twin brother Seth, the comedian does his best to make his interview with the actor as uncomfortable as possible.
Check out the interview below! Warning: Language NSFW.
Join OK!'s Online Book Club on Tuesday at 8 p.m. to read the book of Zach's upcoming movie, It's Kind of a Funny Story!