Moore campily showed off the extreme prosthetics used to depict her “Substance” character’s tragic descent.
StarDemi Mooreis celebrating in an unusual way.
“Spoiler alert,” Moore wrote in a ThursdayInstagram post.

Demi Moore in ‘The Substance’ costume with her dog, Pilaf.Demi Moore/Instagram
Happy Halloween from Elisabeth Sparkle."
In another, she takes a grimacing selfie splattered in fake blood.
But it comes with terrifying side effects.

Demi Moore in ‘The Substance’.MUBI/Everett
Was this where I should be putting my energy?"
Courtesy Cannes Film Festival
Qualley also recounted toEWhow she"started sobbing" while rehearsing intense choreography.
I was just like, ‘Ill be right back, I got this!’

Demi Moore in ‘The Substance’.Courtesy Cannes Film Festival
It was really outside my comfort zone.
Im not a natural."
The Substanceis currently available to stream on MUBI.