Catherine, Duchess of Cambridge and Prince Louis of Cambridge

Prince Louisshowed the world his adorable cheeky side duringQueen Elizabeth’s Platinum Jubilee celebrations.

Kate Middletonand Prince William’s youngest child, 4, joined them at Trooping the Colour on Thursday and thePlatinum Jubilee Pageanton Sunday, both times bringing laughter to the festivities due to his enthusiastic waves, animated faces and interactions with older siblings Prince George, 8, and Princess Charlotte, 7.

“He’s a cheeky monkey — a typical third child,” someone who knows the family tells PEOPLE in this week’s issue. “It’s nice that the world got to see him enjoying himself.”

Queen Elizabeth and Prince Louis.Aaron Chown/PA Images via Getty Images

Queen Elizabeth II speaks to Prince Louis on the balcony of Buckingham Palace

Prince Louiseven amused his great-grandmother the Queen during Thursday’s balcony appearance at Buckingham Palace, with the monarch grinning as the young royal turned to chat with her during the Royal Air Force’s flypast — which caused little Louis to cover his ears from the noisy planes at points.

To make things even more adorable, Prince Louiswore the same mini sailor suitthat his father wore to Trooping at age 2 in 1985. (The same year Louis' uncle,Prince Harry, made his own Trooping the Colour debut!)

Queen Elizabeth II Jubilee then and now

Prince Louishad afront-row seat to the festivitiesagain on Sunday, when the Cambridge family gathered for the weekend’s big finale: the Platinum Jubilee Pageant.

Prince Louispointed out elements of the parade to Kate,“read” the programand stood up on his seat to get a better look.

Although hemade a few cheeky facesat his mom, he also cuddled sweetly with Kate — and took turns also sitting on the laps of dad Prince William and grandfatherPrince Charles!

Kate Middleton and Prince Louis.RICHARD POHLE/POOL/AFP via Getty

Britain’s Catherine, Duchess of Cambridge (L), Britain’s Prince Louis of Cambridge and Britain’s Princess Charlotte of Cambridge (R) watch the Platinum Pageant in London on June 5, 2022 as part of Queen Elizabeth II’s platinum jubilee celebrations. - The curtain comes down on four days of momentous nationwide celebrations to honour Queen Elizabeth II’s historic Platinum Jubilee with a day-long pageant lauding the 96-year-old monarch’s record seven decades on the throne. (Photo by Richard Pohle / POOL / AFP) (Photo by RICHARD POHLE/POOL/AFP via Getty Images)

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While the weekend was a celebration ofQueen Elizabeth’s record-breaking reign spanning 70 years, it was also a look ahead to the future of the monarchy, withPrince Charles, Camilla,Prince Williamand Kate playing large parts in the events.

Adds Sally Bedell Smith, author ofElizabeth the Queen: The Life of a Modern Monarch: “She is in the saddle, but this gets people accustomed to [Charles'] future role asKing. There was a feeling of celebrating the past and anticipating the new era.”

source: people.com