For Disney, she portrays Wanda Maximoff/Scarlet Witch in the 2014 Marvel action film, Captain America: The Winter Soldier, the 2015 film, Avengers: Age of Ultron, the 2016 film, Captain America: Civil War, the 2018 film, Avengers: Infinity War, the 2019 film, Avengers: Endgame, the 2021 film, Doctor Strange in the Multiverse of Madness, and the TV series WandaVision.
- Olsen was originally considered for the role of Sharon Carter in Captain America: The Winter Soldier, but at the end, Emily VanCamp was cast instead. However, Olsen ended up portraying Scarlet Witch in The Winter Soldier and many subsequent Marvel Cinematic Universe's installments.
- Olsen was uncredited for her appearance in the post-credit scene of Captain America: The Winter Soldier.
- She was considered for the role of Rey in Star Wars: The Force Awakens along with Jennifer Lawrence and Shailene Woodley.