The thriller genre first became popular in the 1920s with Hitchcock's film "The Lodger". It grew in popularity through the 1960s when Hitchcock's "Psycho" was considered one of the best thrillers ever made. Since then, the main theme has been blood and violence, influenced by the graphic scenes in "Psycho". The 1950s saw stars like Marilyn Monroe appearing in thrillers, while the 1970s brought R-rated films with extreme scenes. More recent decades saw a rise in female villains and psychological thrillers. Typical thriller settings include cities, houses isolated in nature, and locations like ballet studios where the story centers. Common characters include criminals, victims,