They were the once close brothers that are now estranged after a bitter rift erupted between them.
But royal fans have spotted that despite their virtually non-existent relationship, Prince William makes a subtle nod to younger brother Prince Harry in a behind-the-scenes clip.
It comes in one of the slick, glossy videos released by William and his wife the Princess of Wales on social media.
In one film posted on their YouTube channel detailing footage from King Charles' celebratory Coronation weekend - William, Kate and their two younger children Princess Charlotte and Prince Louis can be seen getting ready to attend the crowning at their Kensington Palace home.
The four all appear one by one in what appears to be a living room at their London home before setting off for Westminster Abbey.
Eagle-eyed royal fans have spotted that when William's daughter Charlotte enters the room, framed pictures can be seen displayed on top of a piano.
And they claim that one shows a stunning picture taken of William and Harry alongside their late mother Princess Diana, which was used for her 1995 Christmas card.
The card was sent a year before she divorced King Charles, then Prince of Wales, and two years before her untimely death at the age of 36.
Royal fans spotted the photo on Tik Tok with one saying: "I honestly wish Harry and William could come together. Diana would be devastated."
The Coronation was the first time the two warring brothers had been seen at the same event since the release of Harry's controversial memoir Spare.
In the explosive book, the Duke of Sussex accused his older brother Prince William of physically attacking him during a heated row. He also dished on a disagreement between his wife Meghan Markle and sister-in-law Kate over bridesmaids' dresses in 2018.
And last week, a friend close to William claimed that the feud between them would not be ending any time soon.
The warring brothers did not speak to one another during King Charles' historic coronation earlier, with Harry returning to his home in Montecito, California, just hours after his father's crowning moment.
It is reported that William and Kate have not spoken to the Duke of Sussex since Queen Elizabeth II's funeral last September.
The source told the Daily Beast : "Put it this way: I don’t think anyone expects Harry to get an invite to William’s Coronation."
They added: "It’s very clear that William and Kate are now extremely important members of the institution, so their view on Harry, which is basically the further away the better, will have to be taken into account."
