A young Prince Harry watched videos of Diana to try and teach himself how to cry - but couldn't.
The Duke of Sussex, 38, revealed to Anderson Cooper on 60 Minutes after the death of his mum Princess Diana he was trying to find a way to cry but instead was left with a "weight on my chest."
Harry told Cooper last night for years he tried to find a way to grief his mum's death but struggled.
He said: "There was this weight on my chest that I felt for so many years that I was never able to cry. So I was constantly trying to find a way to cry."
In an effort to try and find a way to grieve, Harry would sit on his sofa and think about all the memories he had with his mum.
Harry added: "But, in even sitting on my sofa and going over as many memories as I could muster up about my mum. And sometimes I watched videos online."
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Harry admitted he watched videos of Diana online to try and make him cry but he was unable to produce a tear.
Anderson Cooper replied if the videos were of his mum, he said: "Of your mom? Hoping to cry?"
Harry said: "Yup", Cooper replied: "And you couldn't?" Prince Harry confirmed: "I couldn't"
He sought treatment from a therapist for the first time seven years ago in a bid to try and help him come to terms with the death of his mum.
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Harry said he also tried experimental treatments such as psychedelics, Ayahuasca, psilocybin, mushrooms to try and help deal with his grief.
He said: "I would never recommend people to do this recreationally. But doing it with the right people if you are suffering from a huge amount of loss, grief or trauma, then these things have a way of working as a medicine."
He added the drugs helped him with the loss of his mum and cleared his head.
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Harry added: "For me, they cleared the windscreen, the windshield the misery of loss.
"They cleared away this idea that I had in my head that - that my mother, that I needed to cry to prove to my mother that I missed her. When in fact, all she wanted was for me to be happy."