He says, “I have a call from Santa, and I go, ‘Hey Santa, how’s it going?’ And he’s like, ‘Everything’s going good. How are the kids?’ And I go, ‘Well, I don’t know. Kids, how are you guys doing?’

They’re like, [whining]. And then I get away with it.” Clooney reveals that he actually has a friend whose phone comes up as ‘Santa.’

George and his wife Amal, who is 45, had their twins in June 2017. Three years later, George talked to PEOPLE about how being a parent changed his perspective. He said, “In marriage, and now with the kids, you give away the selfishness of only looking out for yourself. It’s a wonderful thing. Amal and I talk about it every day. We feel so lucky.”

Amal joined George at the movie premiere, wearing a bright yellow gown with a sweetheart neckline, while George wore a black suit with a navy blue shirt. The movie, The Boys in the Boat, tells the true story of the University of Washington’s 1936 men’s rowing team, who went from being the college’s second-tier crew to winning gold at the Summer Olympics in Berlin.