Lily Collins is penning a memoir

Of sharing such details with the public, she said: "It's definitely like having my diary published."

The 'Mirror Mirror' actress was inspired to write the tome by director Warren Beatty and her role in 'Rules Don't Apply' as devout baptist Marla Mabrey, which sees her character overcome "intense" situations.

She explained: "I was put into many situations throughout the years in acting, in Warren's film especially, where you're in an intense situation and you have to fight your way through it, go through the emotions, and live and breath those scenes."

Lily was previously romantically linked to her co-stars in both 'The Mortal Instruments' and 'Abduction', Jamie Campbell Bower and Taylor Lautner, and while she won't be name-dropping any ex-boyfriends, she will open up about what she has learnt from past relationships.

She told People magazine: "It was not about attacking, it was about showing how you can be given situations in life and turn them into lessons.

It takes knowing what you don't want to know what you do want."

Lily is also writing the book in the hope of inspiring other young women who share their lives on social media.

She said: "This is my way to open up conversation with young women and say, 'Hey, we're all the same.'

"They're so open and honest and inspiring about their stories. It really encouraged me to be brave like them."

The announcement comes hot off the heels of Phil, 65, launching his own autobiography, 'Not Dead Yet', in which he candidly talks about his battle with alcohol addiction and the ups and downs of his career spanning 60 years.

Lily's book will be published through HarperCollins and will be out in March 2017.