Distribution principale
Борис Ливанов
Pyotr Vinogradov, inventor
Valentin Tsishevskiy
Senya Kaufman
Константин Градополов
Kotya Okhotnikov
Galina Pashkova
Valya, music student
Nadezhda Ardi
Tonya, architecture student
Иван Переверзев
Physical education instructor (uncredited)
Татьяна Барышева
Senya's mother (uncredited)
Всеволод Санаев
Red army sailor (uncredited)
Галина Степанова
Young girl (uncredited)
Сергей Антимонов
Professor (uncredited)
Ева Милютина
Spectator at the concert (uncredited)
Мария Ключарева
Middle aged woman (uncredited)
