The film is set in Naples. Two doubles, an American and a Neapolitan, alternate visiting Zaza, the maid of a magazine company, deceived by their resemblance.
| Actor | Role |
|---|---|
 Nino TarantoIl Napoletano e Il Americano | Il Napoletano e Il Americano |
 Isa BarzizzaZazà | Zazà |
 Guido NotariNot listed | Not listed |
 Amedeo TrilliNot listed | Not listed |
 Giuseppe PorelliNot listed | Not listed |
 Agostino SalviettiNot listed | Not listed |
 Giuseppe PierozziNot listed | Not listed |
| BBruno CantalamessaNot listed | Not listed |
 Claudio ErmelliNot listed | Not listed |
| GGuido MorisiNot listed | Not listed |
 Egisto OlivieriNot listed | Not listed |
| UUmberto SilvestriNot listed | Not listed |
 Gioia ColleiNot listed | Not listed |
| MMaria Pia SpiniNot listed | Not listed |
 Galeazzo BentiNot listed | Not listed |
| FFelice MinottiNot listed | Not listed |
| AAlfredo SalvatoriNot listed | Not listed |
 Francesco RosiDomestico dell'Americano | Domestico dell'Americano |