Maria Schell as Natalia

Marcello Mastroianni as Mario

Jean Marais as L'Inquilino

Marcella Rovena as La Padrona della Pensione

Maria Zanoli as La Domestica

Elena Fancera as La Cassiera

Lanfranco Ceccarelli as Un Coinvolto nella Rissa

Angelo Galassi as Un Coinvolto nella Rissa

Renato Terra as Un Coinvolto nella Rissa

Corrado Pani as Un Giovinastro

Dirk Sanders as Il Ballerino

Clara Calamai as La Prostituta

Giorgio Albertazzi as L'Inquilino / Narratore (uncredited)

Lys Assia as La Cantante (uncredited)

Romano Barbieri as Il Figlio della Famiglia Amica di Mario (uncredited)

Alberto Carloni as Il Locandiere (uncredited)

Dino D'Aquilio as Un Ragazzino (uncredited)

Enzo Doria as Il Marinaio Che Balla (uncredited)

Anna Filippini as La Figlia della Famiglia Amica di Mario (uncredited)

Carla Foscari as (uncredited)

Biagio Gambini as Dancer (uncredited)

Ferdinando Gerra as Il Padre della Famiglia Amica di Mario (uncredited)

Giorgio Listuzzi as La Guardia di Finanza (uncredited)

Leonilde Montesi as La Madre della Famiglia Amica di Mario (uncredited)

Sandro Moretti as Un Giovinastro (uncredited)

Mimmo Palmara as L'Uomo Che Gioca a Carte con la Prostituta (uncredited)

Winni Riva as (uncredited)

Sandra Verani as (uncredited)