Festival Film. Venice Film Festival. Mandibles (French: Mandibules) is a 2020 French-Belgian comedy film written and directed by Quentin Dupieux. It stars David Marsais, Grégoire Ludig, Adèle Exarchopoulos, India Hair, Roméo Elvis, Coralie Russier, Bruno Lochet, and Dave Chapman. Mandibles had its world premiere at the 77th Venice International Film Festival on September 5, 2020. Jean-Gab and Manu, two simple-minded friends, find a giant fly stuck in the trunk of a car and set themselves up to train it to earn money with it.