Natasha Romanoff, otherwise known as the Black Widow, is a recurring character in the Marvel Cinematic Universe films. She appeared in Iron Man 2, The Avengers, Captain America: The Winter Soldier, The Avengers: Age of Ultron, Captain America: Civil War, Avengers: Infinity War, Avengers: Endgame
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and will appear in Black Widow. Scarlett Johansson plays her. She is a beautiful but mysterious woman with gymnastic skills and martial arts and is a S.H.I.E.L.D. agent.