We caught up with Leonardo DiCaprio, Margot Robbie and Brad Pitt, to talk about their latest film, 'Once Upon A Time In Hollywood,' a movie set in the late 1960s, during the final years of Hollywood's Golden Age. To have a little fun (and put them on the spot), we put their movie chops to the test and asked which classic films they have yet to see — 'Gone With The Wind', 'Star Wars', 'Sound of Music' — their answers will surprise you. 😂 | MTV News