Prince Harry explained what it was like taking mushrooms in Courteney Cox's house

Prince Harry has more bizarre confessions to share with the world in his newly released memoir Spare, which has already become the UK's fastest-selling non-fiction.

The latest revelation from the Duke's tell-all book is definitely one that no one saw coming - the details of his psychedelic experience while staying at Courteney Cox's house.

Yes, Prince Harry is pals with Monica Geller herself, and had a pretty wild night at her home after breaking into a box of mushrooms.

Recalling the bizarre night out in his new book, Harry explained that he had been at a party at his friend Thomas's girlfriend's house when they wound up with an invite to the Friends star's home.

Harry remembers being told that Courteney had been travelling for work but she had invited his pals to 'crash at her place.'

Since Harry was a 'Friends fanatic', he jumped at the opportunity, thinking that 'crashing at Monica's was highly appealing and amusing.'

That's why Harry was so shocked when Courteney actually showed up later that night.

Thankfully, Courteney was more than happy to have Harry and his friends in her home, but Harry was still a little taken back.

"I was still confused because… she was Monica. And I was a Chandler,” Harry wrote in the book.

The Duke of Sussex even confessed that he had had a crush on Courteney at the time, and wondered if there was 'enough tequila in California to give him enough 'courage to tell her.'

Later on into the party, Harry recalled going to the actor's fridge for a drink when he spotted 'a huge box of black diamond mushroom chocolates' which had been set out for everybody.

"My mate and I grabbed several, gobbled them, washed them down with tequila," he wrote.

When the psychedelic drugs hit him, Harry remembers hallucinating in the bathroom - thinking that the bin had transformed into a 'head', and every time he pressed down on the foot pedal, the head opened its mouth into a 'huge open grin.'

Meanwhile, his pal Thomas wasn't having such a good time, and believed his coat had turned into a dragon.

It's not for everyone, hey?

"My delightful trip had been his hell. How unfortunate. How interesting," he mused in the book.

How very thoughtful, Harry. Hope your friend was okay in the end.

Elsewhere in the book, Harry confesses that he had taken cocaine as a teenager in the hopes that it would make him feel 'different.'

"At someone’s house, during a hunting weekend, I was offered a line, and since then I had consumed some more," he wrote.

"It wasn’t very fun, and it didn’t make me feel especially happy as seemed to happen to others, but it did make me feel different, and that was my main objective. To feel. To be different."

"I was a 17-year-old willing to try almost anything that would alter the pre-established order."