| Kevin Spacey | | Jack Vincennes |
| Russell Crowe | | Bud White |
| Guy Pearce | | Ed Exley |
| James Cromwell | | Dudley Smith |
| Kim Basinger | | Lynn Bracken |
| Danny DeVito | | Sid Hudgens |
| David Strathairn | | Pierce Patchett |
| 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 |
| Graham Beckel | | Dick Stensland |
| Sandra Taylor | | Mickey Cohen's Mambo Partner |
| Steve Rankin | | Officer Arresting Mickey Cohen |
| 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 | | Leland 'Buzz' Meeks |
| Michael Warwick | | Sid's Assistant |
| Simon Baker | | Matt Reynolds |
| Shawnee Free Jones | | Tammy Jordan |
| Matthew Allen Bretz | | Officer Escorting Mexicans |
| 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 | | Michael Breuning |
| Michael McCleery | | William Carlisle |
| George Yager | | Gangster at Victory Motel |
| Jack Conley | | Vice Captain |
| Ginger Slaughter | | Secretary in Vice |
| Jack Knight | | Detective at Detective Bureau |