Vladimir Solovyov
Mikhail Ivanovich Kalinin
Grigori Belov
Ivan Vladimirovich Michurin
Aleksandra Vasilyeva
Aleksandra Vasilyevna Michurina
Nikolai Shamin
Terentiy
Fedor Grigoiev
Kartashov
Mikhail Zharov
Khrenov
Konstantin Nassonov
father Khristofor
Aleksei Zhiltsov
Bykov
Ivan Nazarov
postman
Viktor Khokhryakov
Ryabov
Dmitriy Dubov
Sinitsyn
Gennadi Pechnikov
Lesnitskiy
Vyacheslav Isayev
Mayer
Sergei Tsenin
Wallace Beard
Yuri Lyubimov
translator
Ivan Kashirin
peasant
Sergey Bondarchuk
selectionist (uncredited)
Aleksandr Smirnov
selectionist (uncredited)
Viktor Klyucharyov
professor Kigunov (uncredited)
Pavel Gaideburov
Pashkevich (uncredited)
Yevgeniya Khovanskaya
Pashkevch's wife (uncredited)
Aleksei Konsovsky
Pashkevich's guest (uncredited)
Klara Luchko
Pashkevich's guest (uncredited)
Anatoliy Larionov
Michurin in his youth (uncredited)
Natalya Sadovskaya
Michurina in her youth (uncredited)
Yevgeni Gurov
Bykov's guest (uncredited)
Pyotr Savin
member of the revkom (uncredited)
Nikolai Khryashchikov
member of the revkom (uncredited)
Anatoli Zhukov
Shurusha (uncredited)
Sergei Antimonov
official (uncredited)
Mikhail Grodskiy
professor (uncredited)
Viktor Matisen
professor (uncredited)
Aleksandr Pelevin
first scientist (uncredited)
Nikolai Neronov
second scientist (uncredited)
Leonid Knyazev
worker (uncredited)
Pavel Vinnik
Kartashov's student (uncredited)
Svetlana Bogolyubova
Natasha (uncredited)
Anatoliy Solovyov
student (uncredited)
Nikolay Lebedev
professor (uncredited)
Andrei Petrov
Meshkov (uncredited)
Vsevolod Semyonov
secretary (uncredited)
Valerian Kazanskiy
guest (uncredited)
Natalia Sadovskaya
Alexandra Michurina in young age (uncredited)