Brad Pitt and Julia Roberts in The MexicanTHE MEXICAN

We've had the evidence for years, but I think it's time we made it official: Brad Pitt is a gonzo supporting player stuck in a (rather dull) leading man's body. Recently, he portrayed the heavily-accented Irish boxer in Snatch, giving the film a jolt of pure, comedic adrenalin - his screen time was brief, but he was the most entertaining performer in the movie - and when he appeared as a supporting actor in 12 Monkeys, Thelma & Louise, and True Romance (probably his best, and easily his funniest, screen work), his performances were well-calibrated and often inspired. Pitt can display a true flair for off-kilter comedy; it's telling that his most enjoyable lead performance has come from the darkly comic cult film Fight Club, where his Tyler Durden was clearly one of Pitt's nutjob character roles gone berserk.