 | Marcello Mastroianni als Federico/ Gino / Reginaldo di Roviano |
 | Belinda Lee als Eileen |
 | Sandra Milo als Flora di Roviano |
 | Eduardo De Filippo als Don Annibale |
 | Claudio Gora als Ingegner Tellandi |
 | Tino Buazzelli als Fra Bartolomeo di Roviano |
 | Franca Marzi als Nella |
 | Ida Galli als Carletta |
 | Lilla Brignone als Regina |
 | Claudio Catania als Poldino di Roviano |
 | Vittorio Gassman als Il Caparra |
| Michele Riccardini als Antonio |
 | Nadia Marlowa als La moglie alla finestra |
 | Enzo Maggio als Fricandò |
| Antoinette Weynen als Monaca #1 |
 | Antonella Della Porta als Monaca #2 |
 | Bruno Scipioni als Otello |
| Duilio D'Amore als Sor Augusto |
 | Enzo Cerusico als L'uomo corteggiatore giovane |
 | Luciana Gilli als La ragazza nel parco |
 | Graziella Galvani als Insegnante di matematica |
| Grazia Collodi als Marisina |
 | Elvira Tonelli als Monaca #3 |
| Anna Maria Di Pace als La bambina a scuola |
| Mario Maresca als Signor Randoni |
| Ennio Flaiano | Screenplay |
| Ettore Scola | Story |
| Antonio Pietrangeli | Director |
| Ennio Flaiano | Story |
| Nino Rota | Original Music Composer |
| Sergio Amidei | Idea |
| Giuseppe Rotunno | Director of Photography |
| Ettore Scola | Screenplay |
| Eraldo Da Roma | Editor |
| Antonio Pietrangeli | Story |
| Ruggero Maccari | Story |
| Ruggero Maccari | Screenplay |
| Antonio Pietrangeli | Screenplay |
| Armando Crispino | First Assistant Director |
| Graziolina Campori | Second Assistant Director |
| Vanda Tuzzi | Script Supervisor |
| Margherita Ferroni | Script Supervisor |
| Rodolfo Martello | Unit Manager |
| Antonio Negri | Unit Manager |
| Lamberto Pippia | Production Secretary |
| Albino Morandin | Production Secretary |
| Nino Cristiani | Camera Operator |
| Osvaldo Massimi | Assistant Camera |
| Antonio Annunziata | Assistant Camera |
| Marcella Benvenuti | Assistant Editor |
| Gastone Antro | Still Photographer |
| Otello Fava | Makeup Artist |
| Goffredo Rocchetti | Makeup Artist |
| Mario Messina | Sound |
| Mario Amari | Sound |
| Maria Teresa Corridoni | Hairstylist |
| Mario Chiari | Production Design |
| Vincenzo Del Prato | Production Design |
| Maria De Matteis | Costume Design |
| Luciana Marinucci | Assistant Costume Designer |
| Enzo Eusepi | Set Decoration |
| Andrea Fantacci | Assistant Set Decoration |
| Armando Trovajoli | Conductor |
| Giuseppe Colizzi | Production Manager |
| Franco Cristaldi | Producer |
