Prince William and Prince Harry have reportedly been "feuding" for years now, following a series of heated fallouts which has left their relationship incredibly strained.
From claims that their divide began when Prince Harry wed Meghan Markle, to allegations that Prince William kicked off the arguing, there is plenty of speculation about the brothers' relationship.
But before the Duke of Cambridge and the Duke of Sussex were at odds, they shared a decades-long brotherly bond like no other - forged in the aftermath of their mother's tragic death.
As children, Harry and William played together and supported each other through the heart-wrenching loss of their mother, Princess Diana.
They were thick as thieves as teenagers, then became brothers in arms when they joined the British Armed Forced back-to-back in 2005 and 2006.
And in 2011, when William wed Kate Middleton in the biggest royal event of the century, it was Harry standing at his side as best man.
Seven years later when Prince Harry married Duchess Meghan, his older brother returned the favour as best man.
Fast forward to 2021 and the royal siblings' relationship is reportedly more strained than ever before," Prince Harry confessed during his explosive interview with Oprah in March.
"As I've said before, I love William to bits. He's my brother. We've been through hell together. I mean, we have a shared experience. But we're on different paths."
So when did things go sour, and how have the brothers navigated their frosty dynamic ever since?
We've taken a look back at their relationship over the years to see when it all changed, in the lead up to their reunion for what would have been Princess Diana's 60th birthday.
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