Claim: Maisie Williams portrays a character.

Margaret Constance `` Maisie '' Williams -LRB- born 15 April 1997 -RRB- is an English actress . She made her professional acting debut as Arya Stark in the HBO fantasy television series Game of Thrones in 2011 , for which she won the EWwy Award for Best Supporting Actress in a Drama , the Portal Award for Best Supporting Actress -- Television and Best Young Actor , and the Saturn Award for Best Performance by a Younger Actor . In 2016 , she was nominated for a Primetime Emmy Award for Outstanding Supporting Actress in a Drama Series .   Williams has also had a recurring role in Doctor Who as Ashildr in 2015 . In addition to television , she made her feature film debut in the mystery The Falling -LRB- 2014 -RRB- , for which she won the London Film Critics ' Circle Award for Young Performer of the Year .