Evgeniy Evstigneev ( Евгений Евстигнеев )

Comrade Dynin

Arina Aleynikova ( Арина Алейникова )

Valya

Ilya Rutberg ( Илья Рутберг )

Gym Teacher

Lidiya Smirnova ( Лидия Смирнова )

Doctor

Aleksei Smirnov ( Алексей Смирнов )

Zavkhoz

Viktor Kosykh ( Viktor Kosykh )

Kostya Inochkin

Lida Volkova ( Lida Volkova )

Lera

Aleksand Mashovets ( Aleksand Mashovets )

Stasik

Tanya Prokhorova ( Tanya Prokhorova )

Mitrofanova

Viktor Uralsky ( Виктор Уральский )

Comrade Mitrofanov

Tatyana Barysheva ( Татьяна Барышева )

Cook

Nina Shatskaya ( Nina Shatskaya )

Counselor

Radner Muratov ( Раднэр Муратов )

Pioneer Leader in a Skullcap (uncredited)

Viktor Markin ( Виктор Маркин )

Parent (uncredited)

Sergei Kokoryov ( Sergei Kokoryov )

Sharafumdinov

Boris Demb ( Boris Demb )

Dima

Yura Bondarenko ( Yura Bondarenko )

Venya

Igor Kryukov ( Игорь Крюков )

Marat

Vyacheslav Tsaryov ( Vyacheslav Tsaryov )

Boy with a Net

Lyude Smeyan ( Lyude Smeyan )

Nelya

A. Largansky ( A. Largansky )

Ekaterina Mazurova ( Ekaterina Mazurova )

Kostya Inochkin's Grandmother

Vova Burdukov ( Vova Burdukov )

Aleksandr Zhiveynov ( Aleksandr Zhiveynov )

Alik Minkovich ( Alik Minkovich )

Violin Boy

Sergei Shappu ( Sergei Shappu )

Violin Boy

Aleksandr Bajkov ( Aleksandr Bajkov )

Bassist Boy

Daya Smirnova ( Daya Smirnova )

Babysitter (uncredited)