Catherine Millet (born 1 April 1948 in Bois-Colombes, Hauts-de-Seine) is a French writer, art critic, curator, and founder and editor of the magazine Art Press, which focuses on modern art and contemporary art.
Born in Bois-Colombes, France, she is best known as the author of the 2002 memoir The Sexual Life of Catherine M.; the book details her sexual history, from childhood masturbation to an adult fascination with group sex. The book was reviewed by Edmund White as "the most explicit book about sex ever written by a woman".
In 2008 she published a sequel of sorts called Jour de Souffrance, translated to English in 2009 as Jealousy: The Other Life of Catherine M.
She is married to the poet and novelist Jacques Henric.