Damian Damięcki as Karlik Rudniok

Maciej Damięcki as Franek Miksa

Michał Bustamante as Stefan Gola

Łukasz Żuławski as Kryza

Ludwik Benoit as Miksa (Franek's father)

Barbara Fijewska as Miksina (Franek's mother)

Gustaw Holoubek as Sądej

Zbigniew Józefowicz as Rudniok (Karlik's father)

Jan Koecher as Bolesławiec

Stanisław Milski as Headmaster Zajączkowski

Kazimierz Opaliński as Kropa

Jarema Stępowski as Sztelmach

Kazimierz Szubert as Kupść

Sławomir Oszczygieł as

Arkadiusz Hoffer as Stachurka

Jerzy Żołnierkiewicz as

Włodzimierz Łuszczykiewicz as

Zofia Bohdziewicz as

Maria Szaflarska as

Maciej Cichecki as

Zbigniew Cybulski as Miner (uncredited)

Henryk Hunko as Man with a Flag (uncredited)

Ignacy Machowski as School Inspector (uncredited)

Irena Szymkiewicz as Woman in an Office (uncredited)