Prince George and Princess Charlotte didn't meet Archie until he was two months old
As fans of the royal family are no doubt away, Meghan Markle and Prince Harry welcomed their first child earlier this year.
Their son, Archie Harrison, was born in May. The Queen and Prince Philip met the newborn within days of his birth.
Meanwhile, Prince Charles, Camilla, Prince William and Kate were all invited to Archie's private christening earlier this month - and are thought to have met him before the special event.
But it turns out there are three members of the royal family he hadn't met until recently: his cousins, Prince George, Princess Charlotte and Prince Louis.
According to The Sun's royal correspondent Emily Andrews, the Duke and Duchess of Cambridge had decided to leave their children at home when they went to go meet their nephew for the first time.
This means that the young royals met their cousin for the first time at a charity polo match - which Prince William and Prince Harry were both playing in - two weeks ago.
Ms Andrews revealed some details of the (incredibly adorable, we're assuming) meeting as she spoke to Yahoo's The Royal Box.
“It was interesting that Polo match because it was the first time that Charlotte and George had actually met Archie, they hadn’t met him for two months so that was lovely.
“Kate and William had been to see Archie at Frogmore Cottage but they hadn’t taken their children with them, so that was the moment at the polo match where all three of the Cambridge kids got to meet Archie.”