The Fences star is the father of 25-year-old twins, Olivia and Malcolm Washington, and shared with ET's Denny Directo at the 2017 NAACP Image Awards on Saturday the one piece of advice he would give to the Clooneys.
"It's going to be a huge challenge, I mean, one baby cries, wakes the other up. It’s going to be on in that household," Damon, 46, added. "[But] he doesn't sleep a lot anyway. He'll be alright. I'm serious, he's got a hell of a work ethic."