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