Acting
Dever's first notable acting role was as Gwen Thompson in the 2009 film An American Girl: Chrissa Stands Strong. In 2011, she garnered an early breakout role as Loretta McCready in the FX series Justified. In the same year, she was cast as a series regular in the ABC (and later Fox) sitcom Last Man Standing, starring with Tim Allen as her father. Starting with the seventh season of the series, Dever transitioned to a recurring role, allowing her to focus on other film and television projects.
Dever's other television credits include Make It or Break It, Modern Family, Private Practice, Party Down, The Mentalist, and Curb Your Enthusiasm. Her 2011 film credits include Cinema Verite, Bad Teacher, and the Clint Eastwood–directed film J. Edgar. In 2012, Dever was nominated three times at the 33rd Young Artist Awards: for her supporting roles in Bad Teacher and Last Man Standing, and for her recurring role in Justified.
In 2013, Dever appeared in supporting roles in the films The Spectacular Now and Short Term 12.
Dever appeared in the 2014 dark comedy film Laggies, directed by Lynn Shelton, alongside Chloë Grace Moretz and Keira Knightley. In the same year, she co-starred in the film Men, Women & Children, directed by Jason Reitman. In 2017, she reunited with Shelton for her drama film Outside In, as a supporting cast member. That same year, she had supporting roles in the films We Don't Belong Here, All Summers End and Detroit.
In 2018, she performed in minor roles for the political drama The Front Runner and the biographical drama Beautiful Boy, the latter alongside Timothée Chalamet.
In early 2019, Dever appeared in the drama-thriller film Them That Follow directed by Britt Poulton and Dan Madison Savage. The film had its world premiere at the Sundance Film Festival on January 27, 2019, and was released on August 2, 2019, by 1091 Media. In mid 2019, Dever starred in the critically acclaimed teen comedy Booksmart directed by Olivia Wilde, opposite Beanie Feldstein. The film had its world premiere at South by Southwest on March 11, 2019, and was released on May 24, 2019, by Annapurna Pictures. She also starred in Unbelievable, a Netflix miniseries that premiered in September 2019. Dever's performance was praised by critics, receiving a Golden Globe nomination for Best Actress – Miniseries or Television Film. She also received nominations for the Critics' Choice Television Award for Best Actress in a Movie/Miniseries, the BAFTA Rising Star Award, and the TCA Award for Individual Achievement in Drama.
In 2020, Dever appeared in the Quibi comedy series Home Movie: The Princess Bride, directed by Jason Reitman, to raise money for World Central Kitchen. Later that year, she co-starred in the Audible audio drama When You Finish Saving the World, written and directed by Jesse Eisenberg. The story is told from the perspective of three family members at different stages of their lives. Dever voices Rachel, an 18-year-old woman recording tapes for her boyfriend stationed in Afghanistan.
In 2020, Dever starred in the television special Coastal Elites, directed by Jay Roach for HBO. On August 17, 2020, she was cast as Zoe Murphy in Stephen Chbosky's 2021 film adaptation of the Broadway musical Dear Evan Hansen.
Dever appeared in an episode of the anthology series Monsterland for Hulu. In 2021, she starred as Abbi Miller in episode 3 of B. J. Novak's FX anthology series The Premise. Dever also starred in the title role of the film Rosaline. She played Betsy Mallum in the 2021 Hulu miniseries Dopesick, for which she received a Primetime Emmy Award nomination.
Dever starred in the sci-fi thriller film No One Will Save You (2023) on Hulu, in which there is almost no dialogue, and received praise for her ability to tell the story almost entirely through facial expressions. In January 2024, it was announced that she would portray Abby in the second season of The Last of Us, which premiered in April 2025. In January 2025, it was announced that she would join the cast of the next film in the Monsterverse franchise, Godzilla x Kong: Supernova, currently set for release on March 26, 2027.
Dever played the lead role of disgraced wellness influencer and convicted con artist Belle Gibson in the biographical Australian miniseries Apple Cider Vinegar. It was released on Netflix in February 2025.