Before the premiere of Ocean's 13, its megawatt stars George Clooney, Brad Pitt, Matt Damon and producer Jerry Weintraub were immortalized in concrete - in the time-honored Hollywood tradition - in front of Grauman's Chinese Theater. "If I had to be on my hands and knees with three other guys," joked George, "it would be them and I mean that in every possible way." All four promptly stuck their hands and feet in the wet cement and left their autographs as well. Brad, however, just signed his initials. "That's what he does," explained George to Access Hollywood. "It's because Prince took his first signature and he's really upset by that."