There is a lot of excitement in the high society of Venice: An Arab prince, who always travels incognito, is said to be in the city. By chance, the elegant Isabella gets to know the handsome heir to the throne - and it does not take long for her to fall madly in love with him. Isabella has no idea that her dream man is really the impostor Gérard, who looks remarkably like the prince and was hounded by the sleazy crook Alfredo on Isabella to steal their precious jewelry.
| Actor | Role |
|---|---|
 Martine CarolIsabelle dos Santos | Isabelle dos Santos |
 Vittorio De SicaAlfredo | Alfredo |
 Philippe NicaudGérard Chevalier | Gérard Chevalier |
 Claudia CardinaleAngelica | Angelica |
 Marthe MercadierAntoinette Sophronides | Antoinette Sophronides |
 Jacques SernasBob Lebel | Bob Lebel |
 Giacomo FuriaStanislas dit Stan | Stanislas dit Stan |
| DDon ZieglerAristide Sophronides dit Soso | Aristide Sophronides dit Soso |
| BBrigitte JuslinBarbara | Barbara |
| IIvan DominiqueJohn | John |
| TTonino LenzaSebastiano | Sebastiano |
 Martita HuntLisa Bradwell | Lisa Bradwell |
 André VersiniLe Marquis Thierry Lepel | Le Marquis Thierry Lepel |
 Ave NinchiYolanda | Yolanda |
| MMario CianfanelliBépi (uncredited) | Bépi (uncredited) |