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 her new film, the actress plays an aging TV star who finds a sinister potion that can give her a younger, more perfect version of herself, but at a horrifying price. Moore, now 61, talks about having suffered due to the entertainment industry's toxic expectations of beauty.

The Substance, starring Demi Moore, is a bright and showy body horror film about aging and the hypersexualization of the female body. But it doesn’t go much further than illustrating at great length that there are nasty cultural attitudes toward older women.

Demi Moore is trying to find the beauty in her new horror movie, The Substance. In the critically acclaimed project, Moore stars as Elisabeth Sparkle, an actress fired from her TV fitness show for being too old.