Vladimir Solovyov

as Mikhail Ivanovich Kalinin

Grigori Belov

as Ivan Vladimirovich Michurin

Nikolai Shamin

as Terentiy

Fyodor Grigoryev

as Kartashov

Mikhail Zharov

as Khrenov

Konstantin Nassonov

as father Khristofor

Aleksei Zhiltsov

as Bykov

Ivan Nazarov

as postman

Viktor Khokhryakov

as Ryabov

Dmitriy Dubov

as Sinitsyn

Gennadi Pechnikov

as Lesnitskiy

Vyacheslav Isayev

as Mayer

Sergei Tsenin

as Wallace Beard

Yuri Lyubimov

as translator

Ivan Kashirin

as peasant

Sergey Bondarchuk

as selectionist (uncredited)

Aleksandr Smirnov

as selectionist (uncredited)

Viktor Klyucharyov

as professor Kigunov (uncredited)

Pavel Gaideburov

as Pashkevich (uncredited)

Yevgeniya Khovanskaya

as Pashkevch's wife (uncredited)

Aleksey Konsovskiy

as Pashkevich's guest (uncredited)

Klara Luchko

as Pashkevich's guest (uncredited)

Anatoliy Larionov

as Michurin in his youth (uncredited)

Yevgeny Gurov

as Bykov's guest (uncredited)

Pyotr Savin

as member of the revkom (uncredited)

Nikolai Khryashchikov

as member of the revkom (uncredited)

Anatoliy Zhukov

as Shurusha (uncredited)

Sergei Antimonov

as official (uncredited)

Mikhail Grodskiy

as professor (uncredited)

Viktor Matisen

as professor (uncredited)

Aleksandr Pelevin

as first scientist (uncredited)

Nikolai Neronov

as second scientist (uncredited)

Leonid Knyazev

as worker (uncredited)

Pavel Vinnik

as Kartashov's student (uncredited)

Svetlana Bogolyubova

as Natasha (uncredited)

Anatoliy Solovyov

as student (uncredited)

Aleksey Bakhar

as division commander (uncredited)

Nikolay Lebedev

as professor (uncredited)

Andrei Petrov

as Meshkov (uncredited)

Vsevolod Semyonov

as secretary (uncredited)

Valerian Kazanskiy

as guest (uncredited)

Natalia Sadovskaya

as Alexandra Michurina in young age (uncredited)

Oleksandra Vasylieva

as Aleksandra Vasilyevna Michurina

Boris Svoboda

as Head of department (uncredited)

Aleksandr Nezhdanov

as Marfin