He's only 55, but George Clooney is already apprehensive about his 60th birthday.
ET caught up with the actor and his pal, Julia Roberts, at the Cannes Film Festival -- where they're promoting their film Money Monster, out May 13 -- and the Hail, Caesar! star candidly admitted that his next milestone birthday is the first one to really worry him.
Asked how he celebrated his big day on May 6, Clooney joked, "By mostly hiding in my room and crying because the next one is 60."
Leave it to a friend like Roberts to help you realize that age is nothing but a number, especially when you're George Clooney.
The five-time co-stars also talked about their recent epic session on "Carpool Karaoke," explaining that their decision to appear in the segment with a big-time singer like Gwen Stefani stemmed mostly from their lack of confidence in their own vocal cords.
"They asked us to do one, just to sing, and I said, 'Why don't we sing with somebody else because we shouldn't be singing,'" Clooney revealed of how the Late Late Show With James Corden appearance came about. "We have heard each other sing and we should not be singing."