Get Richard Simmons here, stat! A moody lump of a 12-year-old, Anaïs Reboux, not only has an eating disorder but also a penchant for singing bleak songs about boredom and death. How jolly! On summer vacation with her family, Reboux hangs with her bratty but beautiful 15-year-old sister, Roxane Mesquida, who discovers amoré with an Italian law student.
Before you can say "Marcia, Marcia, Marcia!," Reboux grows jealous of her older sibling's sexual awakening. Fat Girl is thin on plot but stuffed with subtext, providing some very French food-for-thought. Director Catherine Breillat achieves a respectable level of realism throughout the flick--until the head-scratching ending, which proves more frustrating than resonant. But Reboux's performance overpowers the slightly unpleasant aftertaste for a satisfying result.