Scarlett Johansson's most popular role to date is that of Natasha Romanoff, also known as Black Widow, in the Marvel Cinematic Universe. Her portrayal of the character has garnered much praise and she even received a standalone movie in 2021. However, Johansson's performance in the film "Marriage Story" is considered her best in terms of acting prowess. Directed by Noah Baumbach, the film explores the breakdown of a marriage and Johansson's performance left the director feeling uneasy. Despite not winning an Oscar for her role, being part of something so impactful is a great achievement.