The No Country For Old Men star will battle the undead in Zombieland. The film revolves around a mismatched pair who have to find friendship and redemption after the world is overrun by zombies, reports The Hollywood Reporter.
(Maybe it's just us, but doesn't this sound an awful lot like British 'Zom-Com' Shaun Of The Dead?)
Zombieland is written by Phett Reese and Paul Wernick.
Harrelson can be seen next alongside Will Smith in Seven Pounds and has recently signed on to appear in Roland Emmerich's new sci-fi epic 2012.