How scary is first-time filmmaker Ari Astershorror movieHereditary?

Well, cast member Alex Wolff was unnerved just reading Asters script.

My mother walked into my bedroom and I screamed out loud, he tells EW.

HereditaryToni Collette

Reid Chavis/A24

I remember having a lot of trouble trying to sleep that night.

I guess the story reveals everything shes ever wanted to know, says Collette of her character.

But it happens in a way that she wasnt expecting and does not enjoy.

Its just impending doom!

It was coming from some serious sh, and deep focus, and hard fing work.

People flipped out at that screening, says the actor.

People were crying and screaming.

I was like, Yes.

Watch the trailer forHereditaryabove.