http://www.youtube.com/watch?v=5jRFQq-fzXA
Back when he was still an unknown, Ben Stiller played a dual small roles in a 1991 horror-comedy called Highway to Hell. The bizarre story involves Chad Lowe venturing into Hell to rescue his girlfriend, Kristy Swanson, who had been kidnapped to become of Satan’s brides. Likely because his famous parents, Jerry Stiller and Anne Meara, had cameos in the film, Ben Stiller has two brief bit parts, one of them as Genghis Khan. Ben’s sister, Amy Stiller, plays Cleopatra in this scene and, yes, that is Gilbert Gottfried playing the role of Adolf Hitler!