Seear's catwalk debut came in September 1998 at New York Fashion Week, where she walked for Calvin Klein, Daryl K and Ralph Lauren.
[3] She has appeared in advertising campaigns for brands such as Chanel, Giorgio Armani, Kenzo, Alor, Pantene Pro-V, Ralph Lauren Polo Jeans, Kenneth Cole, Neiman Marcus, Alberta Ferretti, Rolex and Yves Saint Laurent, where she was memorably styled as the Mona Lisa by Leonardo da Vinci for the Rive Gauche ad campaign in 1998.
[3] During her career, she has walked the runway for designers such as Balenciaga, Lanvin, Karl Lagerfeld, Alexander Wang, Proenza Schouler, Ralph Lauren, Diane von Furstenberg, Givenchy, Chanel and Alexander McQueen.
[3] Seear has also pursued a career as an actress, and played the role of Heidi in the sequel to the movie Twilight, New Moon.
[4] Seear also made a guest appearance in season 2 of House of Lies in the episode "Damonschildren.org".