She started out as a child actor in Fatty Finn (1980), and was later featured in the films Hunting (1991), Spotswood (1992) and Ellie Parker (2005).

She had a starring role in the Australian comedy television series Willing and Abel (in which she appeared as "Angela Reddy").

As a young girl she was also in the Australian film Fortress, which was about the kidnapping of a teacher (played by Rachel Ward) and a small class of students.

She has made guest appearances in other Australian television series, including her brief recurring role of troubled teen Gabe in A Country Practice, The Flying Doctors, G.P., Blue Heelers and Winners.

Rigg had a role as Nurse Amy as part of the Mr Bad storyline on hugely popular Australian soap E Street, playing the girlfriend of her real-life boyfriend at the time, and future husband, Simon Baker.