Mimi Keene, born 5 August 1998, is an English actress. She is known for her roles as Cindy Williams in the BBC soap opera EastEnders and Ruby Matthews in the Netflix series Sex Education.
In 2016, Keene appeared in an episode of Casualty as Lana Westmore, and played Megan in a short film, The Escape, in 2017. Keene also had voice roles for video games, Castlevania: Lords of Shadow 1 and 2. In 2019, Keene portrayed the younger version of Edith Tolkien in Tolkien, began playing Ruby Matthews in the Netflix series Sex Education, and appeared in the film Close.