Demi Moore had quite the Halloween surprise for fans of The Substance. In celebration of her horror film becoming able to stream on MUBI, the actress decided to share four shocking behind-the-scenes photos from the set of her latest critically acclaimed movie.

In one of the pictures, Moore’s face is covered in blood, to the point where even part of her shirt is stained. In all of the photos, Moore has prosthetics on her face, head and body for her transformation into an elderly woman — saggy boobs and all.

Demi Moore shared some behind-the-scenes photos that shocked her fans — at least the ones who haven't yet seen The Substance. As a Halloween treat, Moore, 61, took to her social media on Thursday, October 31,

The four-photo gallery features Moore in eerily lifelike prosthetics that transform her into a grizzled, warped, and distended old creature. In one she wears a prosthetic skin covering her top half and bike shorts while holding her micro-Chihuahua, Pilaf. In another, she takes a grimacing selfie splattered in fake blood.