Demi Moore's gory new film The Substance is leaving Brits walking out after mere minutes as they say it's the 'most graphic film they've ever seen'

Demi Moore 's gory new film The Substance is leaving Brits walking out after mere minutes as they say it's the 'most graphic film they've ever seen'.

The Substance aims to tackle the issue of impossible Hollywood beauty standards and sees Demi play the role of Elisabeth Sparkle.

Unceremoniously sacked as she hits her 50th birthday, Elisabeth discovers a black-market drug which can create a 'younger, more beautiful, more perfect' version of its user. But the drug's strict conditions are gruesome.

So gruesome in fact, that cinema-goers have been walking out of after just minutes due to the extreme level of gore.

'At least 20 people walked out of my screening in Leicester Square before the end. It was brutal,' a viewer told The Sun .

'Most people watched it through their hands. It was the most graphic film I've ever seen.'

Demi discussed the film and her character on her first ever appearance on The Graham Norton Show on Friday.

The Ghost star was joined on the show by her canine companion Pilaf, a chihuahua who attends many of her public events with her.

Her little dog proved to be an instant hit with Lady Gaga, who was also on the show alongside Colin Farrell and Richard Ayoade.

Talking about the critically acclaimed film, she said: 'It is almost impossible to fully describe because it is dealing with some serious subject matters.

'The best way I can sum it up is that it is like The Picture of Dorian Gray meets Death Becomes Her meets a Jane Fonda workout video.'

Asked if it was liberating not to worry about what she looked like for the role she said: 'I was very much pushed out of my comfort zone, but it was great to show up and be allowed to look bad!'

Elsewhere in the conversation, Demi reminisced about being nude on the cover of Vanity Fair when she was seven months pregnant with daughter Scout.

She said: 'It really was taken just for me but then I got the call to say they would like to use it. I said yes, never thinking it would have the impact it did.'

The Substance's 'deliciously unhinged and dread-inducing' levels of gore that have really commanded the critics' attention, with one describing it as 'a shocking assault on the senses'.

The film sees Elisabeth dealt a devastating blow on her birthday when she is fired by ruthless executive, played by Dennis Quaid.

Feeling rejected by a town that once loved her and despairing over her bygone star power, Elisabeth learns from a handsome young nurse about a black-market drug that promises to turn the user into a 'younger, more beautiful, more perfect' version of them self.

Though Elisabeth initially tosses the phone number in the bin, she soon fishes it out in a desperate panic and places an order.

The one rule to follow is that Elisabeth and her better self Sue (Margaret Qualley) must trade places every seven days.

So for one week at a time, she is forced again to live as her 50-year-old self.

But the allure of youth and a made-for-TV butt proves too strong to resist that she tests the boundaries to see what the worst that can happen is if she squeezes an extra day or two in.