Olga Konstantinovna Tschechowa (Russian: Ольга Константиновна Чехова; born Knipper; 14 April 1897 – 9 March 1980) was a Russian-German actress. She was born in Aleksandropol, Erivan Governorate, Russian Empire or now known as Gyumri, Armenia. Her film roles include the female lead in Alfred Hitchcock's Mary (1931).