Posting on the official Twitter page for the two royals, Prince William and Kate wished the youngster a happy birthday alongside a photo of Harry and Meghan and other members of the firm.
The photo shared, which includes Kate and William, Harry and Meghan, as well as Prince Charles and Camilla, is the same the one used when the Cambridge’s wished Archie happy birthday when he turned two last year.
The Cambridge’s public post comes amid speculation about their relationship with the Sussexes.
Rumours of the rift between the two couples first circulated in 2019 after Prince Harry said in an ITV documentary that he and his older brother were “on different paths”.
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