Prince Harry and Meghan Markle welcomed their first child Archie Mountbatten-Windsor in 2019, only a year after Kate and William's youngest son Prince Louis was born, with Charlotte and George also arriving a few years before him. However, despite the similarity in age, the cousins are unlikely to spend a great deal of time together growing up as they live on opposite sides of the Atlantic. The Duke and Duchess of Sussex moved to California with their toddler son last year after they dramatically announced they were stepping down as senior royals.
But Ingrid Seward, author of Prince Philip Revealed; A Man of his Century, said the cousins may start to form a stronger bond and start to "really appreciate" each other when "they are older".
She told Express.co.uk: "I am sure Diana would have wanted her sons' offspring to be friends as she would have known how difficult it is to form friendships outside the family as people cannot be trusted not to let some indiscretion slip out.
"But they may be friends with Archie when they are older.
"How cool to have a Californian cousin who is going to be such a dude as Archie.Insurance Loans Mortgage Attorney Credit Lawyer
Archie may not form a "childhood bond" with his Cambridge cousins (Image: PA)
"So exciting for them to go and stay with him too and vice versa.
"So they may not have the childhood bond, which they really don’t need as they have lots of little friends, but they will really appreciate Archie later on in their lives."
The royals were plunged into crisis earlier this year when Meghan and Harry spoke about their struggles as working members of the Royal Family.
Meghan talked about her son Archie not receiving security after he was not made a prince, unlike Kate and William's three children.
READ MORE: Meghan Markle urges young girls to confront 'every day struggles'
Meghan and Harry moved to California with Archie last year (Image: GETTY)
She also suggested Archie was