Her career as a child actress shifted into high gear when she was cast as the Cockney waif Jody Turner in Lantern Hill (1989), for which she won a Gemini Award, the Canadian equivalent of the Emmy, in 1992. Produced by Kevin Sullivan, the film was based on the book by Lucy Maud Montgomery, author of Anne of Green Gables (1985). When Sullivan created a television series based on Montgomery's work, he cast Polley in the lead role of Sara Stanley in Avonlea (1990). The series propelled Polley into the first rank of Canadian TV stars and made her independently wealthy by the age of fourteen.