is a Canadian actress. She made her feature film debut in the drama film Smashed (2012). In 2013, she appeared in the film The F Word, for which she received a Canadian Screen Award nomination for Best Supporting Actress. From 2014 to 2017, she starred as computer programmer Cameron Howe in the AMC period drama series Halt and Catch Fire.
Davis co-starred as Yorkie in the Emmy Award-winning Black Mirror episode "San Junipero", for which she received critical acclaim. She appeared in the films The Martian (2015), Blade Runner 2049 (2017), and portrayed the title character in the comedy-drama film Tully (2018). She then starred as the augmented super-soldier Grace in Terminator: Dark Fate (2019), and co-starred in the comedy film Happiest Season (2020). In 2021, she had a lead role in the miniseries Station Eleven, which earned her a Critics' Choice Super Award for Best Actress in a Science Fiction/Fantasy Series.