Aimee made her professional screen debut in Miss Conception when she was 9 years old, playing a young Heather Graham. Aimee then went on to play Princess Myrcella Baratheon in the pilot of Game of Thrones. After the full series of Game of Thrones was commissioned, Aimee had to re-audition for the role. After a lengthy audition process, she was offered the role and went on to play Princess Myrcella Baratheon in seasons 1 and 2. Since leaving Thrones, Aimee has gone on to play Althea in the BBC's The Sparticle Mystery, Gemma in Dinosaurs for RTE in Ireland, and most recently as Minnie in the BBC series My Mother and Other Strangers.