Check out the pictures of Renee Zellweger, John Kraskinski and George Clooney as they arrive for the world premiere of Leatherheads in Los Angeles yesterday.

John Kraskinski commented on working with big names Renee Zellweger and George Clooney, saying, “On my first day filming, I was terrified. Renee immediately saw that and she calmed me down by getting me to talk – because I wasn’t breathing very well. They always remember their first day and that’s what makes them great stars.”

More pics of Renee Zellweger, John Krasinski and George Clooney at the Leatherheads premiere after the jump.