Lillian Pulitzer Rousseau (Lillian Lee McKim; November 10, 1931 – April 7, 2013), better known as Lilly Pulitzer, was an American fashion designer and socialite. She is known for founding Lilly Pulitzer, Inc., which makes clothes with bright, colorful patterns. Because the brand has been very popular with rich people, Lilly has been called the "Queen of Prep".