Heather Marks (born May 27, 1988 in Calgary, Canada) is a top model. She was discovered walking down the street and started modeling at the age of twelve. She has done shows and advertisements for Karl Lagerfeld, Calvin Klein and other prominent fashion designers. She has appeared on the covers of magazines such as Vogue, Dazed, French and Mixte.

She is known in the fashion world for her big eyes and "doll-like" features. Along with Gemma Ward, Caroline Trentini, Lily Cole, Lisa Cant, Jessica Stam, and Devon Aoki, she is part of the rising trend of models with these "doll-like" or "elvin" features. They are called "baby dolls" or "baby doll aliens" by internet fans.