Following the underground success of his first feature film, Siri's directorial style caught the eye of actor Bruce Willis, who asked Siri to direct his big-budget 2005 action thriller Hostage. While not a big commercial success, the film earned considerable critical praise of Siri's slick direction, calling it "an art house version of the Die Hard films."
He wrote with Julien Rappeneau and made a film biopic titled My Way (Cloclo) about the French pop singer, songwriter and dancer Claude François portrayed by Jérémie Renier. It will be released in France in March 2012. In November 2012 he was named a Chevalier in the Ordre des Arts et des Lettres.