George Clooney is famed for pranking his fellow actors on set—something Matt Damon learned firsthand.
George even tricked his The Monuments Men costar into thinking he was gaining weight during filming. But, as Matt explained Tuesday, Jan. 14, on The Tonight Show With Jay Leno, George was so stealth in his handiwork that he didn't even realize he was being pranked until after the movie wrapped.
"I read finally, which answered a lot for me, that he'd been taking my wardrobe in," said Matt, explaining that "every couple of days" George was having his pants taken in "about an eighth or a sixteenth of an inch."
success!