A few weeks ago saw the Blu-ray release of the Extended Director's Cut of 1973's infamous 'The Exorcist.' The film, directed by William Friedkin, tells the story of 12-year-old Regan MacNeil (Linda Blair), a seemingly-innocent young girl who begins to experience strange and increasingly violent and disturbing behavior. After her mother (Ellen Burstyn) tries every medical intervention to save her, she realizes that Regan may be controlled by an other-worldly and evil power.

Desperate for help, she calls on Father Karras (Jason Miller) and Father Merrin (Max von Sydow) to perform an exorcism on her daughter. As Regan displays more and more frightening abilities, the priests realize they may in fact be dealing with the Devil himself.

'The Exorcist' became an immediate -- and controversial -- sensation and, over the years, a variety of modern myths have developed around the film. To celebrate the arrival of the Blu-Ray version of the film -- featuring restored footage not seen on its first release -- here are 20 things you may not have known about the 'The Exorcist' -- and its legend.