Actress Demi Moore and Margaret Qualley star in 'The Substance,' a feminist horror film directed by Coralie Fargeat.

The film premiered at the Cannes Film Festival to a 13-minute standing ovation.

The movie explores themes of self-hatred and extreme beauty standards.

Moore's character, Elisabeth Sparkle, uses a mysterious substance to create a younger version of herself named Sue.

As Sue abuses the substance, Elisabeth's body deteriorates in gruesome ways.

The film features shocking scenes of nudity and unsettling visuals, garnering critical acclaim.

Demi Moore emphasized the vulnerability required for her role.

Dennis Quaid also stars in the movie.

'The Substance' is considered an instant body horror classic with a 100% score on Rotten Tomatoes.

The film has drawn comparisons to works by David Cronenberg.

Acquired by Mubi, the U.S. release date is still pending.

The movie marks a potential comeback for Demi Moore and has received early praise for delving into the boundaries of beauty and vanity.