Margaret Constance "Maisie" Williams is an English actress. In 2011, she debuted in a professional acting role at age fourteen, starring as Arya Stark, a main-cast role in the HBO medieval fantasy epic drama series Game of Thrones (2011–2019), a portrayal that quickly brought the acting newcomer global attention. Williams received critical praise and accolades for her work on the show, including two nominations for the Primetime Emmy Award for Outstanding Supporting Actress in a Drama Series. Williams' other television appearances include guest starring in four episodes of the BBC science fiction series Doctor Who (2015), the British docudrama television film Cyberbully (2015), the British science-fiction teen thriller film iBoy (2017) and the comedy action drama series Two Weeks to Live (2020). Williams also voiced Cammie MacCloud in the American animated web series Gen:Lock (2019–present). In 2014, she starred in her first feature film, the melodramatic coming-of-age mystery drama The Falling, for which she received critical acclaim and awards recognition. She had co-starring roles in films such as the romantic period-drama film Mary Shelley (2017), the animated prehistorical sports comedy film Early Man (2018), and the romantic comedy-drama film Then Came You (2018). In 2020 she starred in the superhero horror film The New Mutants and the psychological thriller The Owners. In 2018, she made her stage debut in Lauren Gunderson's play I and You at the Hampstead Theatre in London, to positive critical reviews. Williams is also an internet entrepreneur. In 2019, she jointly developed and co-launched the social media platform Daisie, a multi-media networking app designed to be an alternative means to help artists and creators (especially those who are trying to get started) in their careers. One of the main purposes of the platform is to support collaboration between creators on artistic projects from across various creative industries, as well as a hosting service upon which creators can showcase their own and joint work.