Marcello Mastroianni as Giovanni Pontano

Jeanne Moreau as Lidia

Monica Vitti as Valentina Gherardini

Bernhard Wicki as Tommaso Garani

Rosy Mazzacurati as Rosy

Maria Pia Luzi as Un'invitata

Guido A. Marsan as Fanti

Vittorio Bertolini as

Vincenzo Corbella as Mr. Gherardini

Ugo Fortunati as Cesarino

Gitt Magrini as Signora Gherardini

Giorgio Negro as Roberto

Roberta Speroni as Beatrice

Umberto Eco as Man at the Party (uncredited)