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Marcello Mastroianni as Bruno Baldassarre |
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Agostina Belli as Teresa Colasanti |
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Ursula Andress as Princess Anna Dell'Orso |
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Peter Ustinov as Harry Hellman |
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Jean-Claude Brialy as Van Nijlen |
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Mario Scaccia as Marino Cianciarelli |
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Gianfranco Barra as Cantalamessa |
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Giuseppe Anatrelli as Carru |
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Serge Frédéric as Melzio |
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Jean-Patrick Junoy as Alex |
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Luigi Zerbinati as The 'Debosciato', nephew of Prince Dell'Orso |
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Angelo Monte as |
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Massimiliano Monti as |
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Francesco Infantino as |
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Antonio Spinnato as |
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Catharina Dahlin as Edith (as Caterina Dalin) |
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Angelo Piazza as |
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Paola Orefice as |
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Nando Paone as Conductor |
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Jimmy il Fenomeno as Protester (uncredited) |
| Directing | Steno | Director |
| Production | Roberto Infascelli | Producer |
| Writing | Ugo Moretti | Novel |
| Writing | Age | Screenplay |
| Writing | Scarpelli | Screenplay |
| Writing | Steno | Screenplay |
| Editing | James Bryan | Editor |
| Editing | Antonio Siciliano | Editor |
| Art | Mario Ambrosino | Art Direction |
| Art | Arrigo Breschi | Set Decoration |
| Costume & Make-Up | Giuseppe Banchelli | Makeup Artist |
| Costume & Make-Up | Franco Corridoni | Makeup Artist |
| Costume & Make-Up | Franco Schioppa | Makeup Artist |
| Costume & Make-Up | Gilda De Guilmi | Hairstylist |
| Production | Hermes Gallippi | Production Supervisor |
| Production | Paolo Infascelli | Unit Manager |
| Production | Egidio Valentini | Production Manager |
| Directing | Louis Pitzele | Second Assistant Director |
| Art | Adriano Tiberi | Props |
| Sound | Luciano Anzellotti | Sound Recordist |
| Sound | Massimo Anzellotti | Sound Effects Editor |
| Sound | Romano Checcacci | Sound Mixer |
| Sound | Maurizio Merli | Boom Operator |
| Sound | Giorgio Pallotta | Sound |
| Camera | Antonio Annunziata | Assistant Camera |
| Lighting | Sergio Coletta | Gaffer |
| Camera | Sergio Emidi | Key Grip |
| Camera | Ubaldo Terzano | Camera Operator |
| Camera | Giovanni Vino | Still Photographer |
| Costume & Make-Up | Luca Sabatelli | Costumer |
| Costume & Make-Up | Nadia Vitali | Costume Assistant |
| Editing | Luigi Gorini | Assistant Editor |
| Editing | Anna Rosa Napoli | Assistant Editor |
| Sound | Riz Ortolani | Conductor |
| Production | Paolo Vasile | Production Secretary |
| Directing | Vivalda Vigorelli | Script Supervisor |
| Sound | Riz Ortolani | Original Music Composer |
| Crew | Luigi Kuveiller | Cinematography |
| Production | Mario Ambrosino | Production Designer |
| Costume & Make-Up | Mario Ambrosino | Costume Designer |
| Directing | Lodovico Gasparini | First Assistant Director |
| Art | Mauro Passi | Assistant Set Decoration |
