Prince Georgeis growing up!
Whatever the weather, George has always appeared in shorts for official royal photographs and events. It’s considered tradition in England for young boys to do so, especially in upper-class society. The concept dates back to the 16th century when boys were dressed in gowns until they were toddlers, after which they would be “breeched” and put into shorts.
“Boys wear short trousers until they are 8,” editor-in-chief ofMajestymagazine Ingrid Seward has previously told PEOPLE. “It is very English.”
Matt Porteous

There is, however, one exception to the rule: royal weddings.
George wore long pants in public for the first time for a special occasion– his uncle Prince Harry‘s wedding toMeghan Marklein May. As a page boy, he wore aminiature version of the Blues and Royals coatthat Harry and William wore to thewedding ceremony. The little prince ditched shorts again for Princess Eugenie‘s wedding in October, where he was also a page boy.
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Another royal tradition? Wearing sibling hand-me-downs.
In the arms of his mother, 8-month-oldPrince Louisis wearing a pair of cotton bloomer shirts, that once belonged to his big brother George. In fact, Georgewore the exact same shorts for a holiday phototaken released exactly four years ago, perched upon a step when he was just 16 months old. The much-lovedGriotte bloomer shortsfrom Amaia cost $54, and Louis wore them with the brand’s ribbed tights in navy and theMayfair bodyin white cotton, which features a traditional Peter Pan collar.
In addition,Prince Louisis also wearing a pair of shoes, the"Alex" from Early Days, that once belonged toPrince George. George wore them on his first tour in April 2014 when he was 8 months old – just like his little brother is now!
Prince Louis and Princess Charlotte.Duchess of Cambridge/PA Wire

And let’s not forgetPrincess Charlotte, 3, who is pulling off her own chicroyal rewear. Wearing the same cardigan that George wore for theQueen’s 90th birthday portraitback in April 2016, the unisex jumper was last seen on Charlotte in theofficial photos celebrating the birth of Louis,released in April. The blue knitted cardigan is from Spanish brandFina Ejerique.
source: people.com