There have been countless accounts of the day when Meghan Markle met the Queen to pick out her wedding day tiara.
Various sources and insiders have shared their knowledge of what happened, with some saying it was a lovely occasion while others suggest it was a stressful day which ended with Prince Harry shouting "what Meghan wants, Meghan gets".
But a new book has offered a new insight into what happened on that much-discussed day.
Author Robert Lacey claims the Queen did deny Meghan her first choice of tiara - but says there was a very specific reason why.
He writes: "Unconfirmed by the palace - but not denied - we were told that the Queen felt that she had to say 'no' to Meghan's first choice, a beautiful emerald headdress that was said 'to have come from Russia'.
"This was code for a sensitive origin, meaning that the treasure was one of those that had found its way into Windsor hands through 'undefined' not to say dodgy channels - and for an undisclosed price - in the aftermath of the Russian Revolution.
"There was scandal attached.
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"For this reason, the emerald tiara was seldom, if ever, put on public display and it would suit neither the palace nor Meghan herself that spring if newspapers started speculating about which Tsrist princess had worn the tiara and how she had been assassinated."
But Lacey claims that Harry didn't understand the context of the piece, and didn't get why the Queen thought it was a bad idea.
He continues: "Unfortunately, Harry's ignorance of both history and family tradition meant that he had no understanding of this subtlety.
Lacey claims that Harry "flew into a rage" when Meghan was told she couldn't wear the piece.
And he says the Monarch was less than impressed with her grandson's outburst, and gave a stern reply.
He writes: "Not for the first time, nor sadly the last, the word 'no' pushed a button inside him and he flew into a rage.
"There were dresses and flunkies present, guarding and organising the jewels, so it was inevitable that his now-famous exclamation should find its way to the outside world - What Meghan wants, Meghan gets!
"Her Majesty did not approve.
"'Meghan cannot have whatever she wants,' was reported to have replied.
"'She gets the tiara that she's given by me."