Steve McQueen, James Garner, Charles Bronson and basically most of the cast of The Great Escape. cool story I heard was when they were filming that movie one of the actors had spent several months in a German POW camp and had given the director a few pointers on things to do to make it more real. The director blew him off and several of the guys who had served in WW2 and Korea went to the director and had a word with him.
They told the former POW that he could talk to the director anytime he wanted, and he'd be very receptive to his advice from now on. LOL.