Tell No One (Ne Le Dis À Personne) is a 2006 French thriller film directed by Guillaume Canet and based on the novel of the same name by Harlan Coben. Written by Canet and Philippe Lefebvre and starring François Cluzet, the film won four categories at the 2007 César Awards in France: Best Director (Guillaume Canet), Best Actor (François Cluzet), Best Editing and Best Music Written for a Film. Alexandre Beck is a doctor who has slowly been putting his life back together after his wife Margot was murdered by a serial killer. Eight years on, Alex is doing well, until he finds himself implicated in a double homicide, which has plenty of evidence pointing to him as the killer – though he knows nothing of the crimes. The same day, Alex receives an e-mail that appears to be from Margot, which includes a link to a surveillance video clip that features his late wife looking alive and well. The message warns Alex that they are both being watched.