Born into an artistic family, Bennett attended Hunters Hill High School and gained an arts and communications degree at University of Technology, Sydney, in 1991. While studying for her degree, she started writing professionally for the Dolly series for teenagers. Bennett later completed an MA in creative writing at the University of Sydney. She worked in a book shop and as a freelance writer, and conducted occasional writers' workshops. Bennett has lived in the Blue Mountains and taught at University of Technology, Sydney. She is the author of a children's reader, Ghosts and Other Scary Critters (1995).