Russell Crowe (Wendell "Bud" White), Guy Pearce (Edmund "Ed" Exley), Kevin Spacey (Jack Vincennes), Kim Basinger (Lynn Bracken), Danny DeVito (Sid Hudgens), James Cromwell (Dudley Smith), David Strathairn (Pierce Patchett) more..., Ron Rifkin (D.A. Ellis Loew), Matt McCoy ("Badge of Honor" Star Brett Chase), Paul Guilfoyle (Mickey Cohen), Paolo Seganti (Johnny Stompanato), Elisabeth Granli (Mickey Cohen's Mambo Partner), Sandra Taylor (Mickey Cohen's Mambo Partner), Steve Rankin (Officer Arresting Mickey Cohen), Graham Beckel (Dick Stensland), Allan Graf (Wife Beater), Precious Chong (Wife), Symba (Jack's Dancing Partner), Bob Clendenin (Reporter at Hollywood Station), Lennie Loftin (Photographer at Hollywood Station), Will Zahrn (Liquor Store Owner), Amber Smith (Susan Lefferts), Darrell Sandeen (Buzz Meeks), Michael Warwick (Sid's Assistant), Simon Baker (Matt Reynolds), Shawnee Free Jones (Tammy Jordan), Thomas Rosales Jr. (First Mexican), Shane Dixon (Officer / Detective at Hollywood Station), Norman Howell (Officer / Detective at Hollywood Station), Brian Lally (Officer / Detective at Hollywood Station), Don Pulford (Officer / Detective at Hollywood Station), Chris Short (Officer / Detective at Hollywood Station), John Mahon (Police Chief), Tomas Arana (Breuning - Dudley's Guy), Michael McCleery (Carlisle - Dudley's Guy), George Yager (Gangster at Victory Motel), Jack Conley (Vice Captain), Ginger Slaughter (Secretary in Vice), Jack Knight (Detective at Detective Bureau), John H. Evans (Patrolman at Nite Owl Cafe) and others.

Curtis Hanson (Screenplay), Curtis Hanson (Producer), Arnon Milchan (Producer), Mali Finn (Casting), Jerry Goldsmith (Original Music Composer), Jerry Goldsmith (Conductor), David L. Wolper (Executive Producer) more..., Richard Stutsman (Special Effects Coordinator), Jay Hart (Set Decoration), Brian Helgeland (Screenplay), Brian Helgeland (Co-Producer), Bob Beher (Foley Editor), Peter Honess (Editor), Randy Berrett (Grip), Jeannine Oppewall (Production Design), Dan Kolsrud (Executive Producer), Robert Deschaine (ADR Mixer), Tami Treadwell (ADR Recordist), Kenneth Hall (Music Editor), Dante Spinotti (Director of Photography), James Ellroy (Novel), Denise Horta (ADR Editor), Michael G. Nathanson (Producer), Ruth Myers (Costume Design), William Arnold (Art Direction), J. Michael Muro (Steadicam Operator), Emily Schweber (Casting Associate), Mildred Iatrou (Dialogue Editor), Charleen Richards (ADR Mixer), Beth Jochem Besterveld (First Assistant Editor), John Panzarella (Location Manager), Rick Avery (Stunts), Lance Anderson (Makeup Artist), Kimberly Lowe Voigt (Dialogue Editor), Arthur Morton (Orchestrator), Carole Henderson Harrington (Assistant Editor), David Orr (Color Timer), Jeff Imada (Stunt Coordinator), Barbara Harris (ADR Voice Casting), John Roesch (Foley Artist) and others.