And now the young royal, three, has melted hearts again after eagle-eyed royal watchers spotted an adorable moment during Saturday's Trooping The Colour celebrations.
The duchess proved her savvy shopping skills yet again today, stepping out in a relatively low-cost Zara dress alongside Prince George and Princess Charlotte to watch Prince William compete for the Maserati Royal Charity Polo Trophy.
Prince George, 4, and Princess Charlotte, 3, may have fancy royal titles and live at Kensington Palace, but aside from those distinct differences, they're just like all other kids.
From Prince George's naughty expressions to the heart-warming wave Princess Charlotte bestows upon the onlookers, the little munchkins have become a source of happiness to many.
Prince Harry played with a toy gun in 1990.
"Completely tone deaf of Kate... to give Prince George a toy gun. THAT is #girlpower", one person wrote.
Four-year-old George, dressed in beige shorts and a navy top, was seen playing with a colourful Slinky and taking aim at his friends with a toy gun. My American side here, biased maybe b/c of everyday #gunviolence in US, but my British side agrees. No child in this day and age should look at any gun as a fun toy.
A third added: 'Prince George has a toy gun ....really!'.
On a visit to Finland last November, William met Father Christmas in Helsinki and was on a mission to present Santa Claus with a Christmas list from George, which featured one request - a toy police auto.
The midi length and waist tie further flatter the frame, making this an easy choice for a Sunday family outing.