 | Jack Nicholson als Robert Eroica Dupea |
 | Karen Black als Rayette Dipesto |
 | Susan Anspach als Catherine Van Oost |
 | Lois Smith als Partita Dupea |
 | Ralph Waite als Carl Fidelio Dupea |
 | Billy Green Bush als Elton |
 | Irene Dailey als Samia Glavia |
 | Toni Basil als Terry Grouse |
 | Lorna Thayer als Waitress |
 | Richard Stahl als Recording Engineer |
 | Helena Kallianiotes als Palm Apodaca |
 | William Challee als Nicholas Dupea |
 | John P. Ryan als Spicer |
 | Fannie Flagg als Stoney |
 | Marlena MacGuire als Twinky |
 | Sally Struthers als Betty |
| Clay Greenbush als Baby (uncredited) |
 | Bob Rafelson als Man in Elevator (uncredited) |
| Bob Rafelson | Director |
| Carole Eastman | Screenplay |
| Bob Rafelson | Story |
| Carole Eastman | Story |
| László Kovács | Director of Photography |
| Richard Wechsler | Producer |
| Bob Rafelson | Producer |
| Christopher Holmes | Editor |
| Gerald Shepard | Editor |
| Bert Schneider | Executive Producer |
| Harold Schneider | Associate Producer |
| Fred Roos | Casting |
| Sheldon Schrager | Assistant Director |
| Toby Carr Rafelson | Interior Designer |
| Walter Starkey | Property Master |
| Charles T. Knight | Sound Mixer |
| Kitty Malone | Foley Artist |
| James Nelson | Supervising Sound Editor |
| Richmond L. Aguilar | Gaffer |
| Bill Curtis | Best Boy Grip |
| Howard Hagadorn | Dolly Grip |
| George Hill | Key Grip |
| Bernie Abramson | Still Photographer |
| Ronald Vidor | Assistant Camera |
| Bucky Rous | Wardrobe Master |
| Peter Denenberg | Assistant Editor |
| Harold Hazen | Assistant Editor |
| Terry Terrill | Script Supervisor |
| Marilyn Schlossberg | Production Coordinator |
| Alfred Schultz | Transportation Captain |
| Bill Green | Second Assistant Director |
| Toby Carr Rafelson | Production Design |
| Bob Minkler | Sound Re-Recording Mixer |
