Six years old boy decides to start school and going by himself to first grade instead of kindergarten.

Kirill Golovko-Serskyas Gleb
Pavel Gayduchenkoas Kosta Korolkov
Marina Yakovlevaas Natasha Alyabina
Igor Kvashaas Arkadiy Borisovich - Doctor
Valentina Talyzinaas Grandmother of Kostya Korolkov
Yevgeni Gerasimovas Gleb's father
Georgiy Shtilas Gnesik
Raisa Ryazanovaas Galina Pavlovna - Mother of Kostya Korolkov
Yuriy Solominas Mr. Gleb
Vakhtang Kikabidzeas Spy