Riggs dreamed to be an actress at a young age and she finally accomplished this dream at the later stage of her life. As an actress, she starred in several theater companies like Bell Shakespeare Company, Queensland Theatre Company, Darwin Theatre Company, La Boite and TN. She is also known for playing the role of Juliet and Lady Capulet in the plays like Romeo and Juliet, Lady Macbeth in Macbeth. She got her rise in fame at the end of 1990s after she began portraying the role of Commandant Grayza in a science fiction television series Farscape. She is also famous for playing the role of cabarets at the L.A. Creation Conventions in 2009. Her nationality is Australian and she is of white ethnicity. Information about her height, net worth and affairs is unknown.