Tell No One (2006)
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.
More at Wikipedia.