Denise Marie Nickerson was an American child actress. At the age of 13 she starred as Violet Beauregarde in the 1971 film Willy Wonka & the Chocolate Factory. She later played Allison on The Electric Company, and had recurring roles as Amy Jennings, Nora Collins, and Amy Collins in the soap opera Dark Shadows. She retired from acting in 1978 and later worked as a receptionist and office manager.

The Exorcist is a 1973 American supernatural horror film directed by William Friedkin from a screenplay by William Peter Blatty, based on his 1971 novel. The film stars Ellen Burstyn, Max von Sydow, Jason Miller, and Linda Blair, and follows the demonic possession of a young girl and her mother's attempt to rescue her through an exorcism by two Catholic priests.