A royal biographer believes Prince William and Kate Middleton will show Prince Harry and Meghan Markle who the real royals are as they're about to visit the U.S. later this year. The Cambridges will host the Earthshot Prize awards ceremony in Boston in December, so will they meet the Sussexes in the said country?

Prince Harry and Meghan Markle have moved to the U.S. since leaving their senior royals in the U.K. in 2020. Now that Prince William and Kate Middleton will hold the £50-million environmental competition in America, will the controversial royal couple be their guests?

California has been known for embracing environmental causes, so it may only be fitting if someone from the state will be part of the upcoming royal foundation. Royal biographer Tom Bower said this trip is a "clever move" as the Duke of Cambridge may deliver a speech about the environment in Boston, Express noted.

"It shows the real royals instead of the Montecito royals," he said. He added that the future king and queen handled the recent Platinum Jubilee very well with the Duke and Duchess of Sussex.

He continued that they managed to control the situation and ensured there would be no "damaging fallout." With that said, Queen Elizabeth was probably pleased that her son, Prince Charles, and grandson, Prince William, "rescued and repaired" the problem.

Prince William, Kate Middleton, Prince Harry and Meghan Markle attended their first major event together at the Platinum Jubilee's national service of Thanksgiving at St. Paul's Cathedral after two years.

However, there was no interaction seen between the four. They weren't even photographed together and seated away from each other, per Elle.

The four also arrived and left the event at different times. They even avoided bumping into each other when they exited the place.

Prince William and Kate Middleton first left, following the typical royal procession. Prince Charles and Camilla, Duchess of Cornwall, alternatively, were in front of them.

Later, Prince Harry and Meghan Markle followed and posed for a picture with Princess Anne's daughter, Zara Tindall and the latter's husband, Mike Tindall.

Though many hoped to see the former Fab Four together, their decision not to interact with one another at all wasn't a surprise. As the weekend celebration mostly focused on Queen Elizabeth, they might have no plans to steal the attention from Her Majesty. In addition, Prince Harry himself had long hinted that things weren't rosy between him and his brother, Prince William.