Sean Penn (Mickey Cohen), Josh Brolin (Sergeant John O'Mara), Emma Stone (Grace Faraday), Mireille Enos (Connie O'Mara), Ryan Gosling (Sergeant Jerry Wooters), Anthony Mackie (Officer Coleman Harris), Giovanni Ribisi (Officer Conway Keeler), Michael Peña (Officer Navidad Ramirez), Robert Patrick (Officer Max Kennard), Nick Nolte (Chief Bill Parker), James Landry Hébert (Mitch Racine), Holt McCallany (Karl Lockwood), Wade Williams (Rourke), Ambyr Childers (Hellhäutige Blondine), Mick Betancourt (Detective Sergeant Will Hendricks), Mac Brandt (Schlägertyp), Brandon Molale (Jimmy 'Bockscar' Knox), Michael Papajohn (Mike 'The Flea'), Jeff Wolfe (Giovanni Vacarezza), Anthony Molinari (Lorenzo Molinari), Austin Highsmith (Patty), Neil Koppel (Max Solomon), Jack McGee (Lieutenant Quincannon), Evan Jones (Neddy Herbert), James Carpinello (Johnny Stomp), Troy Garity (Wrevock), Austin Abrams (Pete), Lucy Davenport (Sängerin im Slapsy Maxie's), Sullivan Stapleton (Jack Whalen), John Aylward (Richter Carter), Dennis Cockrum (Elmer Jackson), Jack Conley (Sheriff Biscailuz), Riel Paley (Reporter in der City Hall), Michael C. Mahon (Reporter in der City Hall), David Fleischer (Reporter in der City Hall), Josh Pence (Officer Darryl Gates), De Aundre Bonds (Duke Del-Red), Maxwell Perry Cotton (Keelers Sohn), Haley Strode (Keelers Ehefrau), Scott Beehner (Reporter im Club Figaro), Jon Polito (Dragna), Lance Barber (Komantsche), Dale Gibson (Flics Burbank), Rick Marcus (Marcus), Mickey Giacomazzi (Auftragsmörder), James Hébert (Mitch Racine)