Florinda Bolkan
Alice Campos / Alice Cespi

Peter McEnery
Henry

Nicoletta Elmi
Paola Bersel / Paula Burton

Klaus Kinski
Professor Blackmann

Lila Kedrova
Mrs. Heim

Caterina Boratto
Boutique Owner

John Karlsen
Alfredo Laurenti / Alfred Lowenthal (as John Carlsen)

Ida Galli
Mary

Miriam Acevedo
Alice's Supervisor (as Myriam Acevedo)

Rosita Torosh
Marie Leblanche (as Rosita Toros)

Luigi Antonio Guerra
(as Luigi Guerra)

Franco Magno
Member of the International Congress (uncredited)

Esmeralda Ruspoli

Feridun Çölgeçen
Hotel Concierge (uncredited)

Bruno Degni
Member of the International Congress (uncredited)

Lidia Zanussi
Member of the International Congress (uncredited)

Luciano Zanussi
Member of the International Congress (uncredited)