Roger Federer

Swiss tennis great Roger Federer says he pretends to be as young as his kids — two sets of twins — Myla and Charlene, eight, and Leo and Lenny, four, in terms of his clothing choices at home.

"Honestly, I think it keeps me young because around them I try not to wear clothes that they can destroy or make super dirty when I'm picking them up, running round in the mud or going for a barbecue. I think they keep me young for the most part," Federer told GQ magazine recently.