| Actor | Marcello Mastroianni (as Reginaldo di Roviano / Federico di Roviano / Gino), Vittorio Gassman (as Giovanni Battista Villari, aka 'il Caparra'), Eduardo De Filippo (as Don Annibale, Principe di Roviano), Claudio Gora (as Ingegner Tellandi), Tino Buazzelli (as Fra Bartolomeo di Roviano) |
| Actress | Belinda Lee (as Eileen Charm), Sandra Milo (as Flora di Roviano), Lilla Brignone (as Regina), Franca Marzi (as Nella), Evelyn Stewart (as Carletta) |
| Director | Antonio Pietrangeli |
| Story | Sergio Amidei |
| Writer (Screenplay) | Ennio Flaiano, Ruggero Maccari, Antonio Pietrangeli, Ettore Scola |
| Links | https://www.imdb.com/title/tt0054867/ |