Krystyna Stypułkowska as Joanna Kossakowska

Władysław Krasnowiecki as Professor Kossakowski

Franciszka Denis-Słoniewska as Professor Kossakowska

Jerzy Przybylski as Joanna's Uncle

Ignacy Gogolewski as Andrzej Wroński, narzeczony Joanny

Tadeusz Janczar as Tadeusz Łokietek

Elżbieta Czyżewska as Krystyna

Jan Güntner as Filip

Wanda Jarszewska as Joanna's Aunt (uncredited)

Marian Jastrzębski as Błażej (uncredited)

Juliusz Kalinowski as Marcin (uncredited)

Ryszard Kotys as Man by the Cloakroom (uncredited)

Barbara Marszel as Weronika Nowak (uncredited)

Irena Orska as Party Guest (uncredited)

Andrzej Rausz as Man putting up a Poster (uncredited)

Piotr Skrzynecki as Cellar Party Member (uncredited)

Tadeusz Szaniecki as Party Leader (uncredited)

Mieczysław Święcicki as Cellar Party Member (uncredited)

Tadeusz Hoszowski as (uncredited)