Henriette Allais (born July 22, 1954 in Jacksonville, Florida) is an American model. She was Playboy magazine's Playmate of the Month for its March 1980 issue. Her centerfold was photographed by Arny Freytag and Richard Fegley. In 1980, she posed for Helmut Newton's "Big Nudes" series. Her portrait "Big Nude III" became the poster for the first exhibition of the series at Galerie Daniel Templon, Paris in 1981. A numbered print of "Big Nude III" was sold at an auction at Christie's in November 2005 for £176,000 ($311,344).