A drab woman scientist, working on machine to harness solar energy, and a pert concert singer look-alike being courted to play her in a movie swap identities and find personal growth, professional success, love, and happiness.

Lyubov Orlovaas Prof. Irina Petrovna Nikitina / Vera Giorgievna Shatrova
Nikolai Cherkasovas Arkadi Mikhailovich Gromov
Mikhail Sidorkinas Viktor Roschin
Faina Ranevskayaas Margarita Lvovna, housekeeper
Rostislav Plyattas Vladimir Ivanovich Bubentsov
Rina Zelyonayaas Gabby Film Makeup Designer
Nikolai Konovalovas Uncle Lionia Mukhin
Garen Zhukovskayaas Operetta star
Boris Petkeras Akakiy Abramovich
Valentina Teleginaas Scientist
Yuri Yekelchik