Due to time constraints, Persin subcontracted the build of Monstro Eliasue’s suit to a U.K.-based company. “We had two full suits, one for a stunt double, and a half-built suit for Margaret, which she wore for closeups.” Persin and his team took care of all the effects, including the boob that squeezes out of one of Monstro’s many holes.

Who would ever want to turn Demi Moore into a monster? That’s precisely what director and writer Coralie Fargeat does in Moore’s latest film, The Substance, which is in theaters now. And as it happens,

In The Substance, Qualley takes on the role of Sue, a more youthful clone of Moore's aging actress who is created by an illicit serum. The film features nudity and plenty of hard to watch moments as the two women, who share one consciousness, inject themselves with the film's titular serum.

Demi Moore plays Elisabeth Sparkle in 'The Substance,' a satirical horror that focuses on the pressures of body standards.

"On paper, this could have been a disaster," Demi Moore said in a recent interview with The Independent. She was speaking, of course, of her highly acclaimed performance in Coralie Fargeat‘s recently released body horror satire "The Substance.