Ailsa Stewart (also Hogan) is a fictional character from the Australian television soap opera Home and Away, played by Judy Nunn. She made her first appearance during the episode broadcast on 17 January 1988. Ailsa was married to Alf Stewart and had a son Duncan. When Nunn decided to leave to devote more time with her novels, she was one of only four original cast members. The role of Ailsa was briefly played by theatre star Nancye Hayes whilst Nunn was taking leave due to illness in 2000.