Harry GuardinoJohnny Torrio Sylvester StalloneFrank Nitti Susan BlakelyIris Crawford John CassavetesFrankie Yale Frank CampanellaBig Jim Colosimo John OrchardDion O'Banion Carmen ArgenzianoJack McGurn George ChandlerRobert E. Crowe John Davis ChandlerHymie Weiss Royal DanoAnton J. Cermak Joe De NicolaCharles Fischetti Angelo GrisantiAngelo Genna Robert PhillipsBugs Moran Martin KovePete Gusenberg Mario GalloGiuseppe Aiello George MilanWilliam H. Thompson Tony GiorgioAntonio Lombardo Don PulfordWilliam Cooper Eugenia StewartMiss Detwiller Redmond GleesonN.Y. Cop #2 John FinneganN.Y. Police Lt. Laurence HagenSamuel Ettelson James V. ChristyThomas Bronk Ralph JamesJudge J.H. Wilkerson John HowardWarden J. Johnston John C. BroderickMaitre d' / Associate Producer James R. SweeneyPrison Doctor George EngelsonTorrio's Doctor Deborah KloseFemale Reporter John FavoriteFirst Reporter John ArmondSecond Reporter Jack O'LearyPool Hall Owner Ben MarinoFrank Gusenberg Vincent Di PaoloMob Soldier (uncredited) John C. BroderickMaitre d' / Associate Producer Ward PrestonArt Direction Ned ParsonsSet Decoration Vilis LapenieksDirector Of Photography Maurice SteinMakeup Artist Patricia MillerHairstylist Jann CarverScript Supervisor Eugene MazzolaAssistant Director Teri SchwartzAssistant Director Barbara MeyerAssistant Editor Robert GravenorSound Mixer Gene CorsoSound Effects Designer Lowell BrownBoom Operator Samuel C. CrutcherAssistant Sound Editor Peter CornbergProduction Supervisor Jerome L. PosnerLocation Coordinator 
