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Pierre Richard as Matthias Duval / Mathieu Duval |
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Camilla More as Elisabeth 'Betty' Kerner |
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Carey More as Elizabeth 'Liz' Kerner |
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Jean-Pierre Kalfon as Ernest Volpinex |
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Andréa Ferréol as Evie |
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Jacques Frantz as Ralph |
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Jean-Pierre Castaldi as Charlie |
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Paul Le Person as le clochard jazz |
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Jean-Claude Bouillaud as l’inspecteur |
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Henri Labussière as le maire |
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Françoise Dorner as |
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Isabelle Strawa as |
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Paul Claudon as |
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Gérald Calderon as |
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Alain Huylebroeck as |
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Gladys Berry as |
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Sean O'Neal as |
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Ajzyk Spigelman as |
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Andréa Ferréol as |
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Yves Robert as l’homme dans l'ascenseur |
| Directing | Yves Robert | Director |
| Writing | Donald E. Westlake | Novel |
| Writing | Élisabeth Rappeneau | Writer |
| Writing | Yves Robert | Writer |
| Writing | Boris Bergman | Writer |
| Production | Xavier Gélin | Executive Producer |
| Sound | Vladimir Cosma | Original Music Composer |
| Camera | Robert Fraisse | Director of Photography |
| Editing | Pierre Gillette | Editor |
| Art | Jacques Saulnier | Production Design |
| Costume & Make-Up | Catherine Leterrier | Costume Design |
| Costume & Make-Up | Thi-Loan Nguyen | Makeup Artist |
| Costume & Make-Up | Daniel Mourgues | Hairstylist |
| Sound | Monique André | Sound Editor |
| Sound | Joël Beldent | Sound Mixer |
| Sound | Jean-Pierre Lelong | Sound Effects |
| Sound | Pierre Lenoir | Sound |
| Sound | Jérôme Lévy | Sound Effects |
| Sound | Claude Villand | Sound Mixer |
