Princess Diana's former butler Paul Burrell has claimed the fact Prince William got more sausages for breakfast than Prince Harry played a part in their alleged rift as older brothers.
Burrell, who was Diana's butler for 10 years, told The Sun newspaper the seeds of rivalry were sown as far back as their childhood, claiming William would get three sausages for breakfast from their nanny whereas Harry would only get two.
"When I look back now, I think maybe I was glimpsing the dynamic at play," he told The Sun.
"One time I saw the nanny give William three sausages at breakfast and Harry had two. And Harry would look at his plate and say, 'How come he gets three?'"
Burrell claimed the nanny responded that William needed "filling up more" as he would be "King one day".
Harry reportedly would then "fall quiet and suck it up".
Burrell also claimed while Diana saw the pair as "absolutely equal", he thinks the hierarchy within the Firm has caused resentment from Harry as the years have gone on.
He said the Duke "found it tough living up to the standard set by William" and this became more apparent when he attended Eton against his mother's wishes.
In interviews to support the release of his memoir Spare, Harry talked of the rivalry between William and himself, even mentioning how his brother ignored him when they started at the same school.
In the book, Harry branded William both his "beloved brother" and "archnemesis."
He also alleged in his new book that he was attacked by his brother with such force that he was "knocked to the floor".
The conflict is said to have happened at Harry's London home at an unspecified time during 2019 and saw William calling Meghan "difficult", "rude" and "abrasive", which Harry said was a "parrot[ing of] the press narrative" about his American wife.
Harry then writes that William "grabbed me by the collar, ripping my necklace, and... knocked me to the floor".
Harry claims the incident resulted in a "visible injury to his back".
Prince William has not publicly responded to any of the claims in the book, though royal sources claimed he was seething with rage at the accusations levied against him and his family.
However, Harry has also hinted that he would like to reconcile with his family as the rift continues to grow, possibly further exacerbated by the book's revelations.
"I would like to get my father back, I would like to have my brother back,” Harry told ITV's Tom Bradby, saying he hoped a "reconciliation will have a ripple effect across the entire world".
"Maybe that's lofty, maybe that's naive, whatever. But I genuinely feel that."