Krystyna Sienkiewicz as Jadwiga Leśniewska

Krzysztof Kowalewski as Andrzej Leśniewski

Wanda Majerówna as Aunt Tosia

Wojciech Siemion as Professor Zbigniew Radosz

Józef Pieracki as Mr Arek

Tadeusz Kwinta as "Weird"

Wojciech Młynarski as Driver

Agata Młynarska as Agnieszka Leśniewska

Maciej Strojny as Leszek Leśniewski

Magdalena Scholl as Beata "Bąbel" Leśniewska

Tomasz Brzezinski as Paweł "Bąbel" Leśniewski

Jan Himilsbach as Longshoreman / Santa Claus / Gabryś

Tomasz Jarosiński as "Blonde"

Kazimierz Kaczor as Idziak

Krzysztof Litwin as Professor Skubiszewski's Assistant

Andrzej Przyłubski as TV Journalist

Bogusław Sochnacki as Mister Kowalski

Krystyna Tesarz as Mrs Kowalska

Wojciech Turowski as Caretaker

Ewa Zalewska as Marysia Kowalska

Zygmunt Zintel as Mr Aleksander

Michał Zabłocki as Krzysiek (uncredited)