Directed by Declan Donnellan. With Robert Pattinson, Uma Thurman, Kristin Scott Thomas, Christina Ricci. Bel Ami movie based on the French novel Bel Ami written by Guy de Maupassant.Directed by Declan Donnellan. With Robert Pattinson, Uma Thurman, Kristin Scott Thomas, Christina Ricci. Bel Ami movie based on the French novel Bel Ami written by Guy de Maupassant.