Leonid Vitalevich Nevedomsky was born on October 13, 1939, in Vitebsk, Belarus, which was then part of the USSR and is now known as Vitsebsk, Belarus. He began his acting career on stage in 1957 at the Sverdlovsk Drama Theatre under the direction of Vladimir Motyl.
After graduating from the Institute of Theatre, Music, and Cinematography in Leningrad (now St. Petersburg) in 1967, Nevedomsky made his film debut in Gorkie zyorna in 1966, which was released in 1967.
Since 1967, Leonid Nevedomsky has been a permanent member of the legendary troupe of Bolshoi Drama Theatre (BDT) in St. Petersburg (Leningrad). Under the directorship of Georgi Tovstonogov at the BDT, Nevedomsky made a remarkable stage career, sharing the stage with some of the most renowned Russian actors of his time, including Oleg Basilashvili, Tatyana Doronina, Alisa Freyndlikh, Lyudmila Makarova, Svetlana Kryuchkova, Zinaida Sharko, Natalya Tenyakova, Elena Popova, Valentina Kovel, Innokentiy Smoktunovskiy, Kirill Lavrov, Oleg Borisov, Vladislav Strzhelchik, Yefim Kopelyan, Sergey Yurskiy, Evgeniy Lebedev, Ivan Palmu, Pavel Luspekayev, Nikolay Trofimov, Georgiy Shtil, Pavel Pankov, Mikhail Volkov, Vsevolod Kuznetsov, Vadim Medvedev, Yuriy Demich, Gennadiy Bogachyov, Andrey Tolubeev, and many other remarkable Russian actors.
Throughout his illustrious career, Leonid Nevedomsky has been honored with numerous awards and decorations for his work on stage and in film. He received the title of People's Artist of Russia in 1994 and has a filmography that includes over 40 roles, as well as over 100 roles on stage. Additionally, Nevedomsky has directed several stage plays. He currently resides in St. Petersburg, Russia.