"This is the story of the blurred line between what is real, and what is an illusion."

Murray, from Bristol, who played Gilly in the hit HBO fantasy series, is releasing her memoir next year in which she shares more about the events which led up to her being sectioned.

The 35-year-old, who rose to fame in 2007 playing Cassie in Skins, reveals how her mental health was impacted when she was detained in 2017, after becoming involved with the group.

Speaking about the book she said: “The Make-Believe tells a deeply personal story that has lived inside me for many years and which it now feels vital to share.”

The publishers, Hutchinson Heinemann told The Sun: “This is the story of the blurred line between what is real, and what is an illusion; what we must accept and what we wish to be true; between solid earth beneath your feet and a world where anything is possible if you only commit. It is about the lure of those that tell us they can save us, and the deceptive structure of organisations that promise us ‘wellness’.

“It’s about the acting world, but also about the way all of us act, hiding our vulnerabilities from everyone except the people trained to prey on them.”

Her character on Skins battled mental health problems and an eating disorder, something which Murray previously said had taken its toll on her.

She was just 17 at the time she portrayed Cassie on the critically acclaimed Channel 4 drama.

Speaking to Backstage she said: “I think [maintaining mental health is] something I learned a lot over the course of my career. My first role, I played a girl with anorexia who had suicide attempts and addiction problems, and it was heavy stuff.

“And I thought being an actor meant being tortured and angst-ridden and suffering and [that] I had to feel everything for real and hold on to it. I really believed in the idea of the tortured artist. And that is not sustainable, by any means.”