The film was immensely popular and incredibly successful when it debuted.

Since its release, it has served as an inspiration for countless movies and the horror genre at large.

The original film spawned several sequels and even a television show.

Padme to the left, Palpatine/Darth Sidious in the middle/background, and Obi-Wan Kenobi and Anakin Skywalker to the right, all from Revenge of the Sith

Even the music needed to be something that would put audiences on edge.

Intriguingly, the music actually came from an experimental album calledTubular Bellsby Mike Oldfield.

The Director and Extended Cuts are also out there ready to view.

Thunderbolts Characters Next to Suicide Squad

It’s hidden moments like those that can be spotted in those later editions if viewers look closely.

The character Chris MacNeil constantly wears a bracelet with a horseshoe on it.

Usually, the symbol would indicate good luck.

Now You See Me Now You Don’t Interview

But it was so complicated to put together.

The sequel toThe Exorcistinvolved another possession, but this time the child involved did not look monstrous.

It can be spotted in the living room.

Split image of scenes from The Exorcist

The viewer doesn’t see how it makes its way up to Regan’s bedroom.

Most likely, this was a technical error.

Or it could just be more indication of Regan’s supernatural ability to make objects move on a whim.

A priest stands in the light of a lamp post from the Exorcist

Pazuzu Statues

Pazuzu is the central antagonist in the classic horror movie.

He is considered the king of demons and the demon that ultimately wound up possessing Regan.

There are images and statues of Pazuzu hidden in the movie.

Dig Site in Exorcist

If fans look carefully, they will see them stashed away in certain frames and moments of the movie.

He helped direct a student film and was a babysitter for Regan one night.

Unfortunately for poor Burke, he winds up dead by being tossed out a window.

Regan levitating in The Exorcist

It is heavily implied that Pazuzu killed Burke while possessing Regan, which seems like the most obvious answer.

One in particular depicts Hansel and Gretel attempting to escape the witch.

The witch and Regan are dressed in the same colors when audiences see it there.

Chris sits next to Regan in The Exorcist

Another shows the Big Bad Wolf dressed as the grandma, meaning the wolf has already infiltrated the house.

All of this alludes to the fact that Regan has already been possessed by Pazuzu.

The voice is enough to give audiences the chills, but creating it wasn’t an easy process.

Linda Blair in the Exorcist II The Heretic

The chilling sound that accompanies it comes from an unlikely source.

Death.they actually used an old, cracked leather wallet that had cards in it.

NEXT:10 Terrifying Horror Movies (That Surprisingly Dont Have Much Bloodshed Or Gore)

Regan MacNeil from The Exorcist

Pazuzu Demon and Regan from The Exorcist

Father Merrin and Karras in The Exorcist

Burke Dennings in The Exorcist

William Friedkin on set for The Exorcist

Father Karras in Regan’s bedroom in The Exorcist

Regan in The Exorcist

Demonic Regan in The Exorcist

The white faced demon in The Exorcist

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The Exorcist - Franchise