MONOS Trailer and Poster Don’t miss the new MONOS trailer and poster! The film, directed by Alejandro Landes (Porfirio), stars Julianne Nicholson, Moises Arias, Jorge Román, Sofia Buenaventura, Laura Castrillón, and Sneider Castro. MONOS will be released in theaters on September 13. On a faraway mountaintop, eight kids with guns watch over a hostage and a conscripted milk cow.