Kate Moss .. Brad Renfro... in Jean-Paul Sartre's "The Age of Reason"... Mathieu is Jean-Paul Sartre.... his female lover, Marcelle, is Jean-Paul Sartre as a female version of Marcel Proust... and Ivich is Simone de Beauvier... Sartre was horrified that Simone de Beauvier would write a book that was a literary appreciation of the work of the Marquise de Sade... that's Ivich..