In her sleeveless black gown, with rows of pearl at the neck and oversized sunglasses, Audrey Hepburn's Holly Golightly defined understated elegance. Hers was the iconic little black dress. It was the work of Hubert de Givenchy, the French couturier who redefined fashion in the wake of World War II. Givenchy the epitome of Paris chic. His death at age 91 was announced Monday. A towering man of elegance and impeccable manners, Givenchy forged close friendships with his famous clients.