George Andrew J. MacKayis 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).
MacKay was born in Hammersmith, London to Kim Baker, a British costume designer from London, and Paul MacKay, an Australian working in lighting and stage management. He grew up in Barnes with his younger sister. He is of Irish descent on his mother's side, his maternal grandmother being from Cork.
MacKay attended The Harrodian School, a private school in London. When he was 17, he unsuccessfully auditioned for entrance to the Royal Academy of Dramatic Art and the London Academy of Music and Dramatic Art.
