Just like literature, film has developed a variety of genres which help us to understand a film's action and its aesthetics; the Western, the thriller and the romantic comedy belong to the most widespread filmic subgenres. Casting is also an important aspect to which you should pay attention; if the film features a well-known actor, his or her star image and the roles he or she previously starred in will contribute to the film's understanding or can signal the film's genre (for example, if an action movie star plays the leading part, you will once again expect an action movie).