Planeta - Ziemia

Piotr Sobociński

Piotruś

Aleksandra Leszczyńska

Piotruś's Grandmother

Irena Laskowska

Piotruś's Mother

Wieńczysław Gliński

Piotruś's Father

Józef Nowak

Driver

Piotr Gniazdowski

Jerzy Turek

Circus Performer

Maja Wodecka

Teacher (uncredited)