Steyaert since she was 14 Age as a model and working model. She has worked with include Jean-Paul Gaultier and Karl Lagerfeld, and stood for William Klein and Petter Hegre front of the camera.

Since 2002, Steyaert is also active as an actress, mainly in smaller independent films. In 2006 she received attention for their role in the film On ne devrait pas exister, who ran on the Director's Fortnight of the Cannes Film Festival.

Steyaert trademarks are their distinctive body modifications, including piercings, implants, scarification, and large tattoos, such as large stars on the nipples