Clooney Pranks Reign Supreme on 'Monuments Men'

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ET's Nancy O'Dell sits down with George Clooney and the cast of The Monuments Men, including Matt Damon, Cate Blanchett, Bill Murray, John Goodman and Bob Balaban. Was George up to his infamous old pranks on set? You betcha! Watch the video to find out what he did to his old pal Matt -- and how he also pranked his dad!
Based on the true story of the greatest treasure hunt in history, The Monuments Men follows an unlikely World War II platoon, tasked by FDR with going into Germany to rescue artistic masterpieces from Nazi thieves and returning them to their rightful owners. With the art trapped behind enemy lines and the German army ordered to destroy everything as the Reich fell, seven museum directors, curators, and art historians find themselves risking their lives in a race against time to defend mankind’s greatest achievements.
The Monuments Men is in theaters everywhere February 7.