The Duke and Duchess of Cambridge are keen to break out of the "royal bubble" and see their work have an impact in America, a royal author has said.
Just last week, it was announced that Prince William's Earthshot Prize awards would be held in Boston at the end of the year after the inaugural event last year was held in London.
This means it is likely that both he and Kate will be headed across the Atlantic to attend the ceremony.
And there is speculation they could embark on a full US tour - visiting locations such as Washington D.C or New York.
And according to royal author Omid Scobie, one of the writers behind the Finding Freedom biography of Prince Harry and Meghan Markle, the Cambridges are keen for a "slice of American pie".
Writing in his column on Yahoo, he said a source told him "William is keen for his work to be seen and have an impact outside of the UK and the royal bubble" and adds: "The charitable landscape in America is huge and he wants to have a presence.”
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He also claims he's been told reconnaissance has been scheduled to gauge for engagements for the couple in Boston - and even beyond.
Scobie writes: "Though the source made no mention of it, I wondered if a little competitiveness with his brother might be in the mix, too.
"Harry’s popularity in Britain may be suffering, but his rise in the US has seen the Archewell Foundation receive huge attention from an impressive list of donors, and his charitable efforts and campaigning has quickly seen him acknowledged by the likes of Forbes and TIME, who named him and Meghan two of the world’s most influential people.
"Though their focus will always be in the UK—where they are currently preparing to move their family base from London to Windsor—it’s clear the Cambridges have realised a slice of American pie would be nice, too.
"And who can blame them? Interest in the Royal Family on the world stage has long been an essential asset to Britain’s appeal abroad."
William revealed his potential trip to the US in a video posted on his and Kate's official Instagram account.
He said: "In 2022, we're back and we're bringing Earthshot to the USA where we'll award the next five winners of the prize."
The award aims to discover and scale up ground-breaking solutions to repair the planet and £1 million in prize money was presented to the winners in five categories or Earthshots – Protect And Restore Nature; Clean Our Air, Revive Our Oceans; Build A Waste-Free World, and Fix Our Climate.
The initiative was inspired by former US president John F Kennedy’s Moonshot project which set scientists the challenge of placing an astronaut on the moon and returning him safely – and in the process helped advance mankind’s achievements.
The John F Kennedy Library Foundation, alongside the City of Boston and its mayor Michelle Wu, will be the host partners of the Earthshot Prize ceremony.