as Arkadiy Zubov
as Genya
as Lyova Prokushev
as Vitya Surikov
as Lidochka
as Katya
as Classmate
as Aronov, classmate
as Seryozha
as Marusya Ivanova, pioneer leader
as Vladimir Vishnyakov, teacher
as Arkadiy's father
as Arkadiy's mother
as School headmaster
as Vitya Surikov's mother
as Classmate
as Doctor (uncredited)
as Friend of Surikov's mother
