Born on the Giabal people's land of Queensland, Australia, to Eileen Cronin, a nurse, and Peter Castles, a saddler. As a young person they aspired to a career in music, however after their first drama class in high school, acting was realised as a contender. After graduating from the University of Southern Queensland's theatre programme, they went on to perform stand up comedy in London and Melbourne, the latter now being home.