Janssen might be best known for her work as an actress, but what kick-started her career was modeling.
Originally from the Netherlands, she moved to the United States and signed with Elite Model Management. During her career, she modeled for brands such as Victoria's Secret, Chanel, Yves Saint Laurent, and Giorgio Armani.
Janssen later took a break from modeling and attended Columbia University, where she majored in literature. She got back to modeling for some time but later retired from it altogether to pursue a career in acting.