joseph l. mankiewicz be not remember by most today a one of the fine director in hollywood history and but this film prove that he be . already a success by do sophisticated american drama such a a letter to three wife and all about eve as well a successfully adapt shakespeare to life in julius caesar and mankiewicz do a marvelous job of bring this hit broadway play to film and do it with style . marlon brando be perfect a sky masterson and even if he can not sing too well . he be the only actor who could pull it off perfectly wit his sheer coolness and clarity . frank sinatra be a wonderful singer and a expect and and do a good job of act a nathan detroit . jean simmons be also very good a sarah brown and her scene with brando sizzle with great chemistry . all support actor do their part and especially sheldon leonard a harry the horse in a very funny bit . still and mankiewicz should be give most of the credit for bring a fine musical in it own right to the screen in such a way that it feel authentic in many scene but be still a story in it own world . all in all and guy and doll be a great musical and work on many level it normally should not have .