Cassie wanted to become an actress ever since she was five years old. She has trained in drama at the Young People's Theatre and Nathan Homestead. Because she wanted to get into acting as soon as possible, she got an agent at the age of 9, as she saw this as the first and best option to achieve her goal. Cassie got her first acting job in the New Zealand kids show "What Now" at the age of 11, where she starred as a field presenter.