Brad Pitt and George Clooney. (Photo: Getty Images) Los Angeles - George Clooney plans to ruin Brad Pitt's career with a prank. The 54-year-old actor is known for his love of gags and admits he has spent years working on a particular joke to play on his friend and Ocean's Eleven co-star. He said: "I am working on a prank that will end his career. If you take the time, if you're willing to sit on one for a couple of years, and just plant the seed... there's no rush."