what is the exorcist about

The Exorcist is a 1973 American supernatural horror film directed by William Friedkin, based on the 1971 novel of the same name by William Peter Blatty. The film stars Ellen Burstyn, Max von Sydow, Jason Miller, and Linda Blair. The story follows the demonic possession of a young girl named Regan and her mothers attempt to rescue her through an exorcism by two Catholic priests. The film is known for its disturbing and graphic content, including extreme violence, gore, and psychological torture. The films special effects and eerie atmosphere have made it one of the scariest films of all time. Despite its controversial content, the film has stood the test of time and is considered one of the most influential horror films of all time.