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Just in case your nerves weren't already shot with what's going on in the world at the moment, the 2018 flick is sure to tip you over the edge.
The film follows miniature artist Annie Graham (Toni Collette), who is mourning the loss of her mother, only for things to take a deeply sinister turn as she uncovers some horrific family secrets.
As well as being a truly dark piece of cinema, Hereditary is also a pretty complicated film, so it might take a couple of watches to get your head around - if you can handle it, that is.
Speaking about the film's themes, director Ari Aster told Vox: "I knew that I really wanted to make a film about the corrosive effects of trauma on a family unit.
"I knew that I wanted to make a film... about a family that's basically eating itself in its grief. It's a story that I certainly had in me. I didn't really have to find it.
"Ultimately, I did want to make a film that was seriously tackling these issues and operating almost as a meditation on these things, while at the same time functioning as an exciting genre film that hopefully delivers."
Aster is also responsible for another piece of particularly dark cinema, Midsommar, which came out last year and follows a couple and their two friends as they travel to an isolated community in Sweden for a festival in the middle of the summer solstice.
But - as you could probably guess - the festival doesn't turn out to be the idyllic retreat they'd hoped for.
And Aster recently revealed that he's got plenty more disturbing ideas rattling around his head.
Earlier this year, he told UC Santa Barbara's Associated Students Program Board that he wants to make a four-hour 'zonky nightmare comedy'.
There's no indication when the project will be allowed to start filming or if there's even a script and cast ready to go.
But if it's anything like Midsommar then you can certainly get ready for something that is truly outrageous. That film, which was released last year, clocked in just under three hours and many felt like they had lived several lifetimes after watching it (again, in a good way).
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