Prince William asked his brother, Prince Harry, not to tell wife Meghan Markle about their clash in Kensington Palace, it's been claimed.
This morning it was revealed Prince William grabbed his sibling by the collar and knocked him to the floor in a brawl following a heated row over the American actress.
In the aftermath of the brawl, the future king reportedly told Harry there was “no need” to tell Meghan.
The revelation is the latest to come from the Duke of Sussex’s upcoming memoir Spare.
William is reported to have said: “You don’t need to tell Meg about this.”
Harry replied: ‘You mean that you attacked me?”
Prince William answered “I didn’t attack you, Harold”, the Guardian reports.
Despite the request, Meghan later noticed the injuries caused by the fight.
When Harry told her about the altercation, she was said to be “not too surprised” or angry - just “terribly sad”.
During their coming together, Prince William is said to have grabbed his brother by his collar, ripping his necklace, before causing him to fall onto the dog’s bowl.
The fall caused scrapes to his back.
Another revelation made in the book suggested King Charles joked on the day of Prince Harry ’s birth at his joy of having an “heir and a spare”.
Millions around the world are waiting to get their hands on the duke's book, due out on January 10.
Its title is a knowing jib at the term ‘an heir and a spare’, referring to the succession of power after the death of the monarch.
Now Harry, 38, has revealed the term has been in his life from the very moment he was born .
He wrote how the now King told his mother Princess Diana on the day of his birth: “Wonderful! Now you’ve given me an heir and a spare.
“My work is done.”
The extraordinary claims came after Prince Harry was seen saying he wants his "father and brother back" in a trailer for a new ITV interview.
The 90-minute special with News at Ten presenter Tom Bradby will be broadcast on January 8, two days before Spare is published.
In a separate interview with CBS News , set to air the same day, Harry also criticised Buckingham Palace over an alleged failure to defend him and his wife, the Duchess of Sussex, before they stepped down as senior royals.
In a separate US interview with Anderson Cooper from CBS News's 60 Minutes programme to be released the same day, Harry describes a "betrayal" by Buckingham Palace and claimed there were "briefings and leakings and planting of stories against me and my wife".