25. Michael Clayton (2007)
Director: Tony Gilroy
Stars: George Clooney, Tilda Swinton, Tom Wilkinson, Sydney Pollack
Films don't get much more grown-up than Michael Clayton, the engrossing directorial debut from Bourne screenwriter Tony Gilroy (who also penned the Clayton script). Anchored by George Clooney in a certified dude-is-a-movie-star performance, the corporate thriller achieves a consistent tenseness as Clooney's morally ambiguous Clayton comes to terms with his own integrity and motivations as he mentally battles his way through a big-business conspiracy.