Patricia Rooney Mara ( MAIR-ə; born April 17, 1985) is an American actress. She began her career in independent films, such as the coming-of-age drama film Tanner Hall (2009), before starring as Nancy Holbrook in the 2010 remake of A Nightmare on Elm Street and as Erica Albright in the biographical drama film The Social Network (2010).
In 2011, Mara had a career breakthrough when she portrayed Lisbeth Salander, the title character in David Fincher's The Girl with the Dragon Tattoo, based on Stieg Larsson's Millennium book series. She received critical acclaim for her performance and was nominated for an Academy Award for Best Actress and a Golden Globe Award for Best Actress in a Motion Picture – Drama. In 2013, she starred in the thriller Side Effects, the independent drama Ain't Them Bodies Saints, and the acclaimed sci-fi romantic drama Her.
At the 2015 Cannes Film Festival, she tied for the Best Actress Award for her role in the Todd Haynes drama film Carol; she was also nominated for an Academy Award, a Golden Globe Award, a British Academy Film Award, and a Screen Actors Guild Award for her performance. The following year, she starred opposite Dev Patel in the biographical drama Lion. In 2017, she played the lead role in the supernatural drama A Ghost Story and Terrence Malick's romantic drama Song to Song. In 2018, she starred in Gus Van Sant's comedy-drama Don't Worry, He Won't Get Far on Foot and portrayed Catholic saint Mary Magdalene in the biblical drama Mary Magdalene.
Mara is also known for her charity work and oversees the Uweza Foundation, which supports empowerment programs for children and families in the Kibera slum of Nairobi, Kenya, one of the largest slums in Africa.