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The youngest members of the royal family are just as close as you would expect. 1 / 6

The Cambridge children first met little Archie Harrison during the Trooping the Colour festivities. 2 / 6

Prince George in particular looked like he was very excited to be around Archie at a polo match. 3 / 6

It will be very exciting to see the royal kids grow up with each other in the spotlight. 4 / 6

Since they'e all very close in age, there’s a good chance that they will continue to bond as they grow! 5 / 6