Trained at the Victorian College of the Arts, Penelope Trevor has acted in the popular theatre production of Mum's the Word in Melbourne and also toured to Perth.
In 1995 and 1996, she wrote three episodes of The Adventures of the Bush Patrol. She also wrote several episodes and worked with the Australian Children's Television Foundation on the plotting and script development of Li'l Elvis Jones and the Truckstoppers (1997-1998). In 2000, she wrote for the children's television series Li'l Horrors.
She has a long history of work in the film and television industry as an actor, with credits including The Sullivans, All the Green Year, Prisoner, and Janus. Trevor has also worked as an editorial assistant for The Melbourne Weekly magazine.