Pazuzu (The Exorcist) the first film, Linda Blair played Regan. Mercedes McCambridge provided the majority of Pazuzu's dialogue, most notably in all the scenes with Fathers Karras and Merrin. In earlier scenes, Pazuzu's voice is provided by Linda Blair herself in some scenes, and Ron Faber in others. The face of Pazuzu is provided by Eileen Dietz, who also plays Regan during the vomiting, levitation and masturbation scenes. Pazuzu is mostly manifested by a swarm of locusts in "Exorcist II: The Heretic", though is also shown possessing the young Regan and a young boy named Kokumo during flashback sequences. While the stand-in for
Regan MacNeil Regan is revealed to have psychic healing powers (the reason why the demon attacked her previously). For "The Exorcist III", Carolco Pictures had the idea of a grown up Regan who gives birth to possessed twins but it was abandoned and the story was switched to Blatty's novel "Legion" instead. John Carpenter was asked to direct "The Exorcist III", but backed out when he realized William Peter Blatty really wanted to direct himself and because of creative differences, however they remained friends. Regan McNeil appears in the television series "The Exorcist". As an adult she changed her name to Angela