Appearing with his father Nick Clooney on Piers Morgan Tonight on Friday, George was asked by his dad to think about tying the knot. Nick noted he'd been married to George's mom Nina for 51 years.
"I hate to blow your whole news story, but I was married," said George, wed to actress Talia Balsam from 1989 to 1993. "Yeah, so I've proven how good I was at it, and I just. ... I'm allowed one."
George, 48, has been dating Italian model-actress Elisabetta Canalis, 32, since 2009.