Olivier Marchal is a French actor, director, screenwriter, and a former policeman. In 2005, he was nominated for three César Awards for his film 36 Quai des Orfèvres. He also created the popular French television police drama Braquo and wrote and directed some episodes in its first season (2009).

36 Quai des Orfèvres is a 2004 French film directed by Olivier Marchal and starring Daniel Auteuil and Gérard Depardieu. The title derives from the original address of the Judicial Police headquarters, part of the larger Palais de Justice of Paris on the Île de la Cité. The film takes place in Paris, where two cops are competing for the vacant seat of chief of the Paris Criminal police while involved in a search for a gang of violent thieves. The film is directed by Olivier Marchal, a former police officer who spent 12 years in the French police. The story is loosely inspired from real events which occurred during the 1980s in France. The film was nominated for eight César Awards. The movie was remade in South Korea in 2019 as The Beast.