Happy Halloween from Demi Moore.

The actress, 61, shared several behind-the-scenes photos from her horror movie “The Substance” on Thursday that could leave you with a total scare.

In one of the photos, Moore’s face is covered in blood, to the point where even part of her shirt is stained.

In all the photos, Moore has prosthetics on her face, head and body for her transformation into an older woman – saggy breasts and all.

“I’ve been holding these gems from @trythesubstance and today feels like an appropriate day to share them,” she began her caption on Instagram.

“Happy Halloween from Elisabeth Sparkle 🧪,” Moore added, before announcing that the Coralie Fargeat-directed feature is now streaming on Mubi.

Moore’s followers reacted strongly to the actress’s sensational photos.

“I wasn’t ready for slide two 😂,” one fan wrote.

“Pretty iconic if you ask me,” said someone else.

“That’s terrifying,” someone else commented.

Fans also praised Moore for her performance in the film, which put her in the Oscars race.

“The Substance” follows an award-winning actress (Moore) who loses her job as host of a popular daytime aerobics TV show when she turns 50. After using a black market drug, she creates a younger, better version of herself. (Margaret Qualley) – with serious consequences.

The film has provoked strong reactions from theater audiences. Many have left the screenings and even gotten sick from the film.

Critics also have strong opinions about the film. Johnny Oleksinski of The Post gave “The Substance” three and a half stars, calling it “the craziest thing I’ve ever seen.”

“I so ridiculously enjoyed this ride of excitement, torment, madness and exploitation that I’ve considered signing up for online therapy to grapple with it,” Oleksinski wrote in his review, likening the film to a “hotter , younger offshoot’ from 1992’s ‘Death Becomes Her’.

Moore has her first full-frontal nude scene in “The Substance,” which she described as “a very vulnerable experience.”

“When I went into it, it really defined itself – the level of vulnerability and rawness that was really necessary to tell the story,” she said at the Cannes Film Festival, where the film had its world premiere in May.

“And it was a very vulnerable experience and required a lot of sensitivity and a lot of conversations about what we were trying to achieve,” the “Ghost” star added.

Moore also gave props to Qualley, calling her 30-year-old co-star “an amazing partner who I felt very safe with.”