"What an excellent day for an exorcism." Forty years ago, the movie that is often still hailed as the scariest of all time hit theaters. "The Exorcist" received mixed reviews upon its Dec. 26, 1973, release, but it made a huge impact on audiences, raking in cash at the box office and garnering a word-of-mouth reputation that's only escalated over time. The movie's lore has become one of Hollywood's most fascinating yarns, and even if today's audiences might find its special effects outdated, the legacy lives on. Celebrate "The Exorcist" with these facts about the film.

"The Exorcist" -- based on William Peter Blatty's novel of the same name -- is inspired by true events that took place in Cottage City, Md., in 1949. Director William Friedkin has remained cagey about the movie's factual details over the years, but he was made privy to the diaries kept by priests, doctors and nurses affiliated with the exorcism.
the exorcist 1973

Ellen Burstyn's role was first offered to Audrey Hepburn, who would only accept if the movie was shot in Rome, where she was living at the time. Next up was Anne Bancroft, who declined because she was pregnant. Friedkin then offered the part to Jane Fonda, who he said called the movie "capitalist rip-off bulls--t." Blatty suggested Shirley MacLaine, but Friedkin made a different decision after Burstyn called him to express interest. She went on to earn an Oscar nomination for the performance.
ellen burstyn

The movie set was famously said to be cursed, inspiring a 2004 episode of "E! True Hollywood Story" that chronicled the oddities. A studio fire burned down all of the set except Regan's bedroom, and Burstyn and Linda Blair (Regan) both sustained injuries during demonic-possession scenes. Two other actors (Jack MacGowran and Vasiliki Maliaros, who play the movie director and Father Damien Karras' mother, respectively) died before the film's release.
the exorcist 1973

Max von Sydow was 44 when he played 74-year-old Father Lankester Merrin. He's said to have worn more makeup than Blair did during the possession scenes.
max von sydow 1973

Even though Blatty felt it should stay, the now-famous "spider-walk" scene was cut just before the movie's release because the wires suspending contortionist Linda Hager were visible. Friedkin remastered the scene for "The Exorcist: The Version You've Never Seen," released theatrically in 2000.
spider walk

Linda Blair, who won a Golden Globe and was nominated for an Oscar, received death threats due to the movie's satanic content. She reportedly had a bodyguard with her for six months following its release.
linda blair 1973

The movie's graphic nature had viewers fainting in the theater, and "'Exorcist' barf bags" were distributed at screenings.
the exorcist

"The Exorcist" is among the rare crop of horror movies to receive a Best Picture nomination. Others include "Jaws," "The Silence of the Lambs" and "The Sixth Sense."
william friedkin oscars
(Friedkin attends a screening of the extended director's cut in 2010.)

With re-releases included and grosses adjusted for inflation, "The Exorcist" remains the highest-grossing R-rated movie of all time.
the exorcist 1973
(Jason Miller, who played Father Damien Karras, and Burstyn onset with Blatty.)

"The Exorcist" sits at No. 3 on AFI's list of 100 Years...100 Thrills, behind "Psycho" and "Jaws." In 2010, it was added to the National Film Registry.
william friedkin the exorcist
(Friedkin, Blair, Burstyn and Blatty attend the re-release's 2000 premiere.)

Also on HuffPost:

Loading Slideshow...
  • Vera Farmiga

    <strong>Horror highlights:</strong> "Joshua" (2007), "Orphan" (2009), "Bates Motel" (2013-present), "The Conjuring" (2013)

  • Patrick Wilson

    <strong>Horror highlights:</strong> "Hard Candy" (2005), "Insidious" (2011), "The Conjuring" (2013), "Insidious: Chapter 2" (2013)

  • Tobin Bell

    <strong>Horror highlights:</strong> All seven "Saw" entries (2004-2010), "Boogeyman 2" (2007), "Haunted" (2012)

  • Jared Leto

    <strong>Horror highlights:</strong> "Urban Legend" (1998), "American Psycho" (2000), "Panic Room" (2002), as well as directing some rather dark 30 Seconds to Mars videos

  • Neve Campbell

    <strong>Horror highlights:</strong> "The Craft" (1996), "Scream" series (1996-2011)

  • Jamie Lee Curtis

    <strong>Horror highlights:</strong> "Halloween" (1978), "The Fog" (1980), "Terror Train" (1980), "Prom Night" (1980), "Halloween II" (1981), "Halloween H20: 20 Years Later" (1998), "Halloween: Resurrection" (2002)

  • Bela Lugosi

    <strong>Horror highlights:</strong> "Dracula" (1931), "The Raven" (1935), "Son of Frankenstein" (1939), "Black Friday" (1940), "The Body Snatcher" (1945)

  • Robert Englund

    <strong>Horror highlights:</strong> "Eaten Alive" (1977), "Galaxy of Terror" (1981), "A Nightmare on Elm Street" series (1984-2003), "Wishmaster" (1997), "Urban Legend" (1998), "Idle Hands" (1999)

  • Tara Reid

    <strong>Horror highlights:</strong> "A Return to Salem's Lot" (1987), "Urban Legend" (1998), "Alone in the Dark" (2005), "The Fields" (2011), "Sharknado" (2013)

  • Jennifer Carpenter

    <strong>Horror highlights:</strong> "The Exorcism of Emily Rose" (2005), "Dexter" (2006-2013) "Quarantine" (2008), "The Factory" (2011)

  • Virginia Madsen

    <strong>Horror highlights:</strong> "Candyman" (1992), "The Haunting" (1999), "The Number 23" (2007), "The Haunting in Connecticut" (2009), "Red Riding Hood" (2011)

  • Christopher Lee

    <strong>Horror highlights:</strong> "The Curse of Frankenstein" (1957), "Dracula" (1958), "The Mummy" (1959), "Nothing But The Night" (1972), "The Wicker Man" (1973)

  • Max von Sydow

    <strong>Horror highlights:</strong> "Hour of the Wolf" (1968), "The Exorcist" (1973), "Needful Things" (1993), "Shutter Island" (2010)