Ivan Vasilyevich Changes His Profession

An ordinary Soviet building manager, living in the 20th century, looks like Tsar of All Rus' - Ivan IV the Terrible (1530 - 1584). He'd never known this, until his neighbor created a time machine.

Ivan Vasilyevich Changes His Profession is a 1973 adventure sci-fi movie directed by Leonid Gaidai, starring Aleksandr Demyanenko, Yuriy Yakovlev, Saveliy Kramarov. It holds an IMDb rating of 8.2/10 from 20,432 votes and runs 1h 28m.