Ruby Ann Barnhill (born 16 July 2004) is an English actress. She played the lead role of Sophie in Steven Spielberg's film of 2016, The BFG. She subsequently provided the voice of Mary Smith in the English dub of the film by Studio Ponoc, Mary and the Witch's Flower.
Barnhill was born in Knutsford, Cheshire, England. She lives with her parents and younger sister in Cheshire, and is a member of the local youth theatre.