Christina Hendricks (born May 3, 1975) is an American actress best known for her starring role in Mad Men as Joan Holloway. One of her other more prominent roles is playing Saffron on the FOX series Firefly. In 2010 by a poll taken by women for Esquire magazine, Hendricks was voted "the sexiest woman in the world." And in the same year she was voted "the best looking American woman", again by Esquire magazine. As an actress, Hendricks has made her mark in a number of guest television appearances