Renee Zellweger has branded her co-star George Clooney a "spoil sport" - because he would never let her fool around on set.
The pair star together in 'Leatherheads', a romantic comedy set in the world of 1920s football, but Zellweger was constantly told off by Clooney - who also directs the movie - for playing with the replica pigskin balls.
But the 38-year-old insists she "couldn't help" herself when it came to throwing the balls in her period costume.
Zellweger tells Parade magazine: "I had on my hat with the feather, and my little high heeled buckled shoes and gloves while I was throwing the pigskin, but I couldn't help myself.
"When I gave it a toss, the director, that would be Mr. Clooney, scolded me and said, 'You put that thing down. What am I going to do with you when you miss and take one on the nose and we've got a close up? Put that ball down.' I thought he was a spoil sport."