| Kevin Spacey | Sgt. Jack Vincennes |
| Russell Crowe | Officer Wendell 'Bud' White |
| Guy Pearce | Det. Lt. Edmund Jennings Exley |
| James Cromwell | Capt. Dudley Liam Smith |
| Kim Basinger | Lynn Bracken |
| Danny DeVito | Sid Hudgens |
| David Strathairn | Pierce Morehouse Patchett |
| Ron Rifkin | Dist. Atty. Ellis Loew |
| Matt McCoy | Brett Chase |
| Paul Guilfoyle | Meyer Harris '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 | Sgt. Richard Alex 'Dick' Stensland |
| Allan Graf | Wife Beater |
| Precious Chong | Wife |
| Symba Smith | Karen, 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 | .Mexican #1 |
| Shane Dixon | Officer #1 at Hollywood Station |
| Norman Howell | Officer #2 at Hollywood Station |
| Brian Lally | Intoxicated Officer at Hollywood Station |
| Don Pulford | Officer #4 at Hollywood Station |
| Chris Short | Officer #5 at Hollywood Station |
| John Mahon | Police Chief |
| Tomas Arana | Det. Michael Breuning |
| Michael McCleery | Det. William Carlisle |
| 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 |
| Gene Wolande | Forensic Chief |
| Brian Bossetta | Forensic Officer |
| Michael Chieffo | Coroner |
| Gwenda Deacon | Mrs. Lefferts |
| Mike Kennedy | Bud's Rejected Partner |
| Ingo Neuhaus | Jack's Rejected Partner |
| Robert Harrison | Pierce Patchett's Bodyguard |
| Jim Metzler | City Councilman |
| Robert Barry Fleming | Boxer |
| Jeremiah Birkett | Raymond 'Sugar Ray' Collins |
| Salim Grant | Louis Fontaine |
| Karreem Washington | Ty Jones |
| Noel Evangelisti | Stenographer |
| Marisol Padilla Sánchez | Inez Soto |
| Jeff Sanders | Sylvester Fitch |
| Steven Lambert | Roland Navarette |
| Jordan Marder | Officer at Detective Bureau |
| Gregory White | Mayor |
| April Breneman | Lookalike Dancer #1 |
| Lisa Worthy | Lookalike Dancer #2 |
| Beverly Sharpe | Witness on 'Badge of Honor' |
| Colin Mitchell | Reporter at Hospital |
| John Slade | Photographer at Hospital |
| Brenda Bakke | Lana Turner |
| Kevin Maloney | Frolic Room Bartender |
| Patrice Walters | Police File Clerk |
| Rebecca Klingler | Police File Clerk |
| Irene Roseen | Ellis Loew's Secretary |
| Scott Eberlein | West Hollywood Sheriff's Deputy |
| David St. James | Detective at Hush-Hush Office |
| Bodie Newcomb | Officer at Hush-Hush Office |
| Jeff Austin | Detective |
| Robert Foster | Detective |
| Kevin Kelly | Detective |
| Henry Marder | Detective |
| Monty McKee | Detective |
| Henry Meyers | Detective |
| Michael Ossman | Detective |
| Dick Stilwell | Detective |
| Jess Thomas | Detective |
| Robert Samuel Thompson | Detective |
| Jody Wood | Detective |
| Jonathan Adler | Photographer |
| Scott McKinley | Cop |
| Jimmy Ortega | 2nd Mexican |
| Gilbert Rosales | 3rd Mexican |
| Rocco Salata | Uniformed Patrol Officer |
| Frank Sinatra | Himself |
| Hennen Chambers | Reporter |
| Deborah Kerr | Herself |
| Virginia Mayo | Herself |
| Marilyn Monroe | Herself |
| Nectar Rose | Marilyn Monroe |
| Jane Russell | Herself |
