Brad Pitt may have one of the hottest butts in Hollywood (remember 'Troy'?) but he refuses to bare it in his latest movie role, "Curious Case of Benjamin Button," insisting producers find a double to replace his rear.
A source tells British newspaper Sun, "Casting notices have been put out looking for suitable rears. Maybe Brad's partner Angelina Jolie doesn't want him stripping off for anyone else these days."
