Kingdom of Heaven
Edward Norton played the (uncredited) role of the leperous King Baldwin IV. Norton said he pined to work with Ridley Scott, but when the "Kingdom" director offered him only the role as the evil French baron, Ed took a pass. "So who's playing the guy in the mask?," Norton said he asked Scott. And Ridley replied, "I'll get someone with a good James Mason voice." So Norton, using his best James Mason voice, then left a message on the director's voice mail - and got the part!