Elina Bystritskaya as Yelizaveta Muromtseva

Sergey Bondarchuk as Yuri Yershov

Sofiya Giatsintova as Anna Yershova, Yuri's Mother

Evgeniy Samoylov as Aleksandr Aganin

Yevgeni Lebedev as Fyodor Ivanovich

Aleksandr Larikov as grandpa Spirin

German Khovanov as Vasiliy Spirin

Yuriy Tolubeev as Nikolai Sladkov

Erast Garin as Koloskov

Antonina Bogdanova as aunt Polya, Muromtseva's neighbour

Sergei Karnovich-Valua as professor Valentin Osipovich

Sergey Dvoretskiy as student Sergei Andreyev

Olga Zabotkina as student Nadya

Vladimir Voronov as Ponomaryov

Sergei Karnovich-Valua as Professor Valentin Osipovich

Boris Lyoskin as Malingerer

Vladimir Chobur as Plant director

Yuri Bublikov as Plant engineer

Valentina Chemberg as Patient's mother

Gleb Selyanin as Volodya, student

Ariadna Kuznetsova as Graduate (uncredited)

Yuri Rodionov as Yura (uncredited)

Alexandra Trishko as Yard-keeper (uncredited)

Tatyana Khorishko as Nastenka Spirina (uncredited)

Yekaterina Sobol as Patient (uncredited)