Sophie Kallinis LaMontagne is a well-known entrepreneur and co-founder of the popular bakery chain, Georgetown Cupcake. She gained fame through her appearances on the reality TV show DC Cupcakes, which showcased her and her sister, Katherine Kallinis, as they built their cupcake business in Washington, D.C. LaMontagne is also an author, having published a cookbook that features various cupcake recipes and baking tips. Her work has contributed to the growing popularity of gourmet cupcakes, and she has been recognized for her innovative approach to baking and business.