What's the title of the porn film, by François Ozon, that Ludivine Sagnier was nominated as Best Supporting Actress for 
Ludivine Sagnier:  She was nominated for two César Awards for Best Supporting Actress in "Swimming Pool" (2003) and "Un secret" (2007). Swimming Pool (film): Swimming Pool is a 2003 French-British erotic thriller film directed by François Ozon and starring Charlotte Rampling and Ludivine Sagnier.
Swimming Pool