So here's the 'Future King of England', with the other two 'Future Kings of England', alongside the woman who's going to outlive them all - their mammy, grandmother and great grandmother - Queen Elizabeth.
She's turning 90, don't you know, so herself and her heirs have posed for a series of commemorative stamps. And, in case you're wondering how Prince George got so tall and he's not even 3, here's his secret...
The Queen and 3 future kings photographed for a stamp; a first for Prince George pic.twitter.com/0qxAGrkVcX
— Peter Hunt (@BBCPeterHunt) April 20, 2016
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That smile. Those shorts. We could scarf him whole!
