Людмила Целиковская
— Sima, his daughter
Павел Кадочников
— Alexey Mukhin, composer
Николай Коновалов
— Anton Ivanovich Voronov, professor
Tatyana Kondrakova
— Dina, Voronov's eldest daughter
Тамара Глебова
— Natalia Mikhailovna, Voronov's wife
Tamara Pavlotskaya
— Yadviga Valentinovna Kholodetskaya
Александр Орлов
— Yakov Grigorievich Kibrik, comedian of the Musical Comedy
Сергей Мартинсон
— Kerosinov, composer
Vitaly Kilchevsky
— Rollandow, tenor
Анатолий Королькевич
— Skvoreshnikov, director of musical comedy
Владимир Гардин
— Johann Sebastian Bach
Анатолий Нелидов
— conservatory vocal professor
Екатерина Соболь
— соседка Холодецкой
Лев Кровицкий
— Samuil, conductor (uncredited)