Stacy London is an American stylist, fashion consultant, author, and magazine editor. She is known primarily for her time as co-host on What Not to Wear, a reality television program that featured wardrobe and appearance makeovers.

After graduating from Vassar College, London started her career as a fashion editor at Vogue and transitioned into being a stylist for celebrities and designers. She moved into television by co-hosting What Not to Wear with first Wayne Scot Lukas and then Clinton Kelly, and doing fashion reporting for Access Hollywood, The Early Show, and The Today Show. From 2009 to 2010, she was a celebrity spokesperson for Pantene, Woolite, Dr. Scholl's, and Riders by Lee. She co-owns Style for Hire and is the creative director of Westfield Style.