Loengrin Minaev
Arkadiy Zubov
Pyotr Grokhovskiy
Genya
Boris Runge
Lyova Prokushev
Lev Mirsky
Vitya Surikov
Dagmara Deringer
Lidochka
Yekaterina Derevshchikova
Katya
K. Gavrikov
Classmate
Grigoriy Aronov
Aronov, classmate
Anatoliy Ignatyev
Seryozha
Vera Altayskaya
Marusya Ivanova, pioneer leader
Pyotr Savin
Vladimir Vishnyakov, teacher
Lev Potyomkin
Arkadiy's father
Nina Rusinova
Arkadiy's mother
Andrei Tutyshkin
School headmaster
Olena Maksymova
Vitya Surikov's mother
Eduard Volodarskiy
Classmate
Anatoli Goryunov
Doctor (uncredited)
Aleksandr Sashin-Nikolsky
Friend of Surikov's mother
