Woody Harrelson has joined the cast of Seven Psychopaths, taking over the gangster role which Mickey Rourke was once in talks for. Olga Kurylenko and Tom Waits have also joined the cast in unknown roles.

Ironically, we reported last month that Mickey Rourke dropped out of The Expendables 2 to focus on Seven Psychopaths, where he would have played a gangster whose dog is kidnapped. However, a deal was never made with Mickey Rourke, which opened the door for Woody Harrelson to step in. The plot centers on a screenwriter (Colin Farrell) who is stuck on how to write his latest script. He gets lured into his friends' (Sam Rockwell and Christopher Walken) plot to steal the gangster's Shih Tzu. The ordeal provides plenty of fodder for his writing, if he can get out of it alive.

Martin McDonagh is directing Seven Psychopaths from his own original screenplay for CBS Films. Production started this week in Los Angeles.