In an interview with ET last month, George's dad, Nick Clooney, gushed about his grandchildren, and revealed how his son has changed since becoming a father.
"Since the word came out that he was going to be a father, no question about it, he changed," Nick said. "This has nothing to do with age, but this is a different kind of maturity. When you figure out that you're going to take that standard responsibility that everybody else has done for years, and now you're on the merry-go-round. You're in the middle."
"I suspect, and I can't verify this," Nick added, "he will not get any standard rest until about December 15."