Director and actor George Clooney attends a press conference to promote the movie "The Monuments Men" at the 64th Berlinale International Film Festival in Berlin, Germany, on Feb. 8, 2013. (Xinhua/Zhang Fan)

Director and actor George Clooney (C) and actor Bill Murray arrive on the red carpet for the premiere of the movie "The Monuments Men" at the 64th Berlinale International Film Festival in Berlin, Germany, on Feb. 8, 2013. (Xinhua/Zhang Fan)

Actor Matt Damon (Front C) and other cast members arrive on the red carpet for the premiere of the movie "The Monuments Men" at the 64th Berlinale International Film Festival in Berlin, Germany, on Feb. 8, 2013. (Xinhua/Zhang Fan)

Actress Michelle Yeoh arrives on the red carpet for the premiere of the movie "The Monuments Men" at the 64th Berlinale International Film Festival in Berlin, Germany, on Feb. 8, 2013. (Xinhua/Zhang Fan)

(R-L) Actor Matt Damon, director and actor George Clooney, actor Bill Murray, actor Bob Balaban and actor Hugh Bonneville attend a press conference to promote the movie "The Monuments Men" at the 64th Berlinale International Film Festival in Berlin, Germany, on Feb. 8, 2013. (Xinhua/Zhang Fan)

Actor Matt Damon (1st R), director and actor George Clooney (3rd R), actor Bill Murray (5th R) and other cast members pose during a photocall to promote the movie "The Monuments Men" at the 64th Berlinale International Film Festival in Berlin, Germany, on Feb. 8, 2013. (Xinhua/Zhang Fan)

Director and actor George Clooney attends a press conference to promote the movie "The Monuments Men" at the 64th Berlinale International Film Festival in Berlin, Germany, on Feb. 8, 2013. (Xinhua/Zhang Fan)

Actor Matt Damon attends a press conference to promote the movie "The Monuments Men" at the 64th Berlinale International Film Festival in Berlin, Germany, on Feb. 8, 2013. (Xinhua/Zhang Fan)