Co-starring alongside Jonah Hill, Clooney admits that while he loves the movie, he "wanted more Jonah."
Jonah Hill said, "I have a really, really small part. They actually got to work with me the more they saw that I work better in incredibly small doses."
Josh Brolin is a studio fixer in this tale from Hollywood's Golden Age, while Channing Tatum's character tap-dances in a sailor suit.
"We were in the airport and we both were trying to, like, you know, humble-brag to each other," Hill said of his co-star Tatum. "We were like, 'Yeah, I just got off the phone with the Coen Brothers.' We both were trying to brag, but it was the same movie."
"Hail, Caesar!" opens in theaters Friday.