Matt continued to make his way around London today, promoting The Bourne Ultimatum and posing for pictures with fans. Our favorite action hero may also be an international heartthrob, but silly Matt seems to think that he's already an old man at 36, saying, "I've got more grey hairs than Brad Pitt. We're not as young as we used to be. Fatherhood has changed us. No more late nights and hanging around Ronnie Scott's listening to jazz like we used to." You gotta love when Matt casually drops the name of one of his Ocean's Thirteen buddies. As far as being old - grey hairs or not, he has definitely not passed his prime in our eyes.