Prince Louis had a front-row seat to the festivities again on Sunday, when the Cambridge family gathered for the weekend's big finale: the Platinum Jubilee ... a few cheeky faces at his mom ...

There's no denying Prince William's incredible ... It couldn't help but remind us of Louis' hilarious antics at the Queen's ...

Born His Royal Highness Prince Louis Arthur Charles of Cambridge, Louis is the third ... the late Queen's Platinum Jubilee, the King's coronation, and Christmas Day at Sandringham, young Louis ...

The Cambridge family — minus Prince Louis! — visited Cardiff Castle ahead of a special Jubilee concert Simon Perry is a writer and correspondent at PEOPLE. He has more than 25 years ...