The new body-horror movie "The Substance" is a wild time, It also took co-stars Demi Moore and Margaret Qualley way out of their comfort zones.

We felt like we knew each other,” Demi Moore tells PEOPLE of Margaret Qualley, her costar in Coralie Fargeat’s horror movie Demi Moore and Margaret Qualley had a personal connection offscreen long before sharing one onscreen in their new movie The Substance.

Moore and Qualley give bravura performances, both surely having faced the scrutiny women in Hollywood and the world are under. Moore allows the camera to film closeups of her thighs and the stomach of a woman who has had kids,

"Unfortunately there is no magic boob potion, so we had to glue those on," the actress said of playing her character, Sue, in the body-horror film

The stars of the body horror film hit the red carpet for its L.A. premiere on Sept. 16 Chelsea Lauren/Shutterstock Scout Willis, Tallulah Willis, Demi Moore and Rumer Willis Demi Moore, Margaret Qualley and Dennis Quaid are bringing the scares with their new film,