People are saying new horror starring Demi Moore is so 'disturbing' fans are walking out of theatres

Demi Moore is no stranger to being in the spotlight, but this time fans are actually struggling to keep their eyes on her.

Ghost, Indecent Proposal, G.I Jane - these are just a few of the titles that have captivated Moore's fans over the years, so it's no surprise that many were excited to see her back on the big screen in her latest project.

Starring as a 'fading celebrity' (the synopsis' words, not mine), Moore plays Elisabeth Sparkle, who's fired from her TV show for being too old.

Desperate not to let her stardom slip away, Sparkle decides to take a black-market drug, which is capable of creating a younger, more 'perfect' version of herself.

The 'new' Sparkle emerges from a slit in the older Sparkle's back - like a horrifying reverse Alien - but needless to say, things don't go quite as planned.

Margaret Qualley stars as the younger version of Sparkle, who must stay alive by injecting herself with a serum from the original's spine.

The movie arrived in the US on September 20 to rave reviews, earning a score of 90 percent from critics on Rotten Tomatoes.

Margaret Qualley plays the 'new' Sparkle (Mubi)

Writing for The Australian, critic Stephen Romei commented: "This is a film unlike any other you will see right now. It will not be to everyone's taste. For this reviewer, who craves originality, it is a winner."

Romei appears to have hit the nail on the head by saying the film, which is titled The Substance, will 'not be to everyone's taste'.

In other responses from viewers, the movie has been described as 'wild, crazy, [and an] insanely gory rollercoaster', and many have admitted they couldn't cope with watching the entire thing.

"Ewww wtf did i just walk out of before it ended," one viewer commented, as another added: "Went to see The Substance last night and we had to walkout for the last hour. Just too gory for me! Seeing where the rest of the plot went I think it was the right call…"

Many film fans couldn't make it through the full movie (X)

Another viewer gave an insightful indication about the impact of the movie as they commented: "The Substance should have audience cams in every screening where you can take away a printed pic of your face on a keyring like they do on Disneyland rides lol."

Those are some pictures I'd want to see.

But while the movie might not be for everyone, those who enjoyed it made clear they really enjoyed it.

"Demi Moore and Margaret Qualley are both phenomenal in this film that has SO much to say. It definitely is not for everyone but I highly recommend it if you love body horror/horror in general," one viewer wrote.

I suppose there's only one way to find out if the movie is for you - The Substance is in theatres now.