George Andrew J. MacKay is an English actor. He began his career as a child actor in Peter Pan (2003). He had starring roles in the British war drama Private Peaceful (2012), the romantic film How I Live Now (2013), For Those in Peril (2013), for which he won a BAFTA Scotland Award, and Marrowbone (2017). He gained wider recognition for his leading role in the war film 1917 (2019) and won a British Independent Film Award for his performance in Femme (2023).