<P> Once Johnson graduated from high school, she signed with the William Morris Agency and started her acting career . She appeared in the critically acclaimed box office hit The Social Network which was directed by David Fincher . She has also appeared in Beastly, Ezna Sands' film Chloe and Theo, and So Yong Kim's film For Ellen . In 2012, she had roles in Christopher Neil's film Goats, with David Duchovny; Nicholas Stoller's film The Five - Year Engagement for producer Judd Apatow, and the film 21 Jump Street . She also played the female lead in Chris Nelson's film Date and Switch written by Alan Yang . </P> <P> In March 2012, Johnson was cast as Kate in the Fox comedy series Ben and Kate, marking her television debut . The show was cancelled on January 25, 2013 after one season . Johnson quickly resumed her film career, and appeared in Need for Speed (2014). She also has been cast in the modern - day film adaptation of William Shakespeare's Cymbeline . </P> <P> In 2013, she had a role as one of the new hires on the "Finale" episode of The Office . Johnson played Anastasia "Ana" Steele in Fifty Shades of Grey, which was released in February 2015 . Johnson won the role over Lucy Hale, Felicity Jones, Elizabeth Olsen, Danielle Panabaker and Shailene Woodley . On February 15, 2015, Johnson appeared on Saturday Night Live's 40th anniversary special and hosted SNL on February 28, 2015, making her the second daughter of a former SNL host (after Gwyneth Paltrow, whose mother Blythe Danner hosted during the show's seventh season in 1982) to host herself . Also in 2015, she reunited with her 21 Jump Street cast member Johnny Depp, playing the mother of his character's child in the feature film Black Mass . </P> <P> In 2015, Johnson starred in Luca Guadagnino's thriller A Bigger Splash, opposite Tilda Swinton, Matthias Schoenaerts and Ralph Fiennes . She also played a lead in the 2016 comedy How to Be Single, with Leslie Mann and her Date and Switch costar Nicholas Braun . </P>

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