Prince Charles' 'Utterly Charming' Moment with Prince Louis

Prince Charles' sweet bond with his grandson Prince Louis was on full display

during Queen Elizabeth's Platinum Jubilee celebrations earlier this month.

At the Platinum Jubilee Pageant on June 5, 4-year-old Prince Louis went viral for

his adorable antics, from making faces at mom Kate Middleton to excitedly

dancing around while watching the parade pass by in front of Buckingham Palace.

At one point, Prince Louis took turns sitting on the laps of Kate and Prince William

before heading over to his grandfather. Prince Charles, 73,

bounced Louis on his lap and pointed out elements of the parade.

The source adds that although it is often said that Kate's parents, Carole and Michael Middleton, are the grandparents