At the time, it was believed that tensions were already brewing between the two brothers.
However, the pair seemed to co-exist peacefully as they said their final goodbyes to the Queen.
At one point, William even seemed to show his younger brother a small gesture of support.

In the midst of this awkward moment, it seems, William allowed Harry to go ahead of him.
To this, William apparently told Princess Catherine, “Let them go through first.”
However, not long after the funeral, William and Harry’s relationship disintegrated further.

“Throughout the series, Harry hinted that there was drama bubbling between him and Prince William.
Apparently, the elder prince was upset about the way Harry brought private disagreements into the public eye.
Naturally, the elder prince’s alleged reaction to the book does not seem to be without merit.

Throughout “Spare,” Harry looks like it’s goading his older brother on.
According to some sources, Harry’s tell-all will make it challenging for the two brothers to reconcile.
And, apparently, the Prince of Wales was not the only royal who felt this way.

Because of these negative feelings, William and Harry did not reportedly interact on the day of the coronation.
It’s a real thorn in the thigh for the Duke and Duchess of Sussex.
I doubt they would’ve attended anyways, but for Harry, it’s the principle.”

Kate can’t stand the sight of Meghan and the feeling is mutual" (viaYahoo!
Harry and William’s feud could have also created an uncomfortable ambiance at the festivities.
Their relationship is frosty."
Writing for The Times, royal expert Valentine Low suggested that this was no accident.
As she captured their likeness, the artist apparently noticed how well the two princes got along.
She later remembered that the pair “were looking at each other, talking and laughing …
They were both utterly charming, quick-witted, and great fun.
Harry was a very different man back then” (viaShe Finds).
Unfortunately, however, things between Harry and William have since gone south.