George Andrew J. MacKay (; born 13 March 1992) is a British 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 was nominated for the BAFTA Rising Star Award, and Marrowbone (2017). He garnered recognition for his leading role in 1917 (2019) which received critical acclaim and numerous awards.