Many celebrated Prince Harry and Prince William's reunion when they walked together with their wives, Meghan Markle and Kate Middleton, outside Windsor Castle to greet the mourners following Queen Elizabeth II's death on Thursday, September 8. However, the surprising get-together still met criticisms, with some saying the Sussexes delayed the meeting.

It was the first time the Fab Four was seen together again. But before Prince William, Kate Middleton, Prince Harry, and Meghan Markle finally reunited, there was said to be a big issue.

Royal watched Hilary Fordwich told Fox News Digital that Prince Harry and Meghan Markle were an "hour late" because King Charles III told his eldest son to "extend the invitation."

"They found out Meghan Markle had her U.S. PR firm book an 'alternate' walkabout, which was headed off," she said. "So, it was a last-minute invitation to head that off; she was breaking protocol (yet again)."

A rep for the former "Suits" star is yet to comment about the issue. Fordwich added that the controversial couple had to "scramble" to prepare for the event.

She even noted that the Duchess of Sussex normally had her hair and makeup team, though she couldn't confirm the truth about this. They weren't in their mourning clothes yet, and Prince Wiliam's offer of reconciliation took 45 minutes of negotiation before they finally reunited.

The negotiation was said to be about the Duke of Sussex's plea for his and his family's security. He's still facing a legal battle against the U.K. government as he fights for his right after stepping down as a senior royal.

The Prince of Wales is also reportedly "dismayed," seeing some coverage mostly focus on Prince Harry and Meghan Markle's movements instead of mourning Queen Elizabeth's demise. "So, he then was resolved to make contact with Harry and Meghan," Fordwich continued.

Meanwhile, Prince William and Prince Harry will reunite again to walk together behind Queen Elizabeth's coffin in a procession in London on Wednesday, September 14, per BBC. The Dukes will be with their father, walking on foot from Buckingham Palace to Westminster Hall, where Her Majesty will lie in state.

They will also be joined by Princess Anne, Princess Andrew, and Prince Edward. Alternatively, Camilla, the Queen Consort, Kate Middleton, Meghan Markle, and Sophie, Countess of Wessex, will travel by car.

The procession will begin at 14:22 BST and is expected to end at 15:00 BST. A service that will run for about 20 minutes will then follow, led by the Archbishop of Canterbury.