Ursa Major (Russian: Большая Медведица, romanized: Bol'shaya Medveditsa, Mikhail Uriokovitch Ursus) is a fictional character, a mutant appearing in American comic books published by Marvel Comics. The character has been depicted as a member of the Soviet Super-Soldiers. The character appeared as a human in the live-action Marvel Cinematic Universe film Black Widow (2021), portrayed by Olivier Richters.