A thriller is a movie genre that relies on suspense and anticipation to engage audiences. It keeps viewers wondering what will happen next throughout the film. Main characters in thrillers often face challenges as they try to solve a mystery or complete a task. Common thriller subgenres include crime thrillers, action thrillers, film noir, psychological thrillers, science fiction thrillers, and religious thrillers. These genres typically feature certain plots, themes, characters, and cinematic techniques to generate tension and suspense. Alfred Hitchcock was a pioneering director of many classic thriller films.