The ‘Prince George Effect’: The Royal Baby’s Most Fashionable Moments [PHOTOS]

His mother, Kate Middleton, has one of the most coveted wardrobes in the world. His grandmother, Princess Diana, was a fashion icon who is still admired today. Even his great-grandmother, Queen Elizabeth II, has an instantly recognizable style.

So it’s no surprise that Prince George, who turns 1 year old on Tuesday, has already become a sartorial superstar in his own right. Just like his mother's outfits, which are chronicled on WhatKateWore.com, Prince George’s ensembles have a following of their own. His website, WhatPrinceGeorgeWore.com, tracks the royal baby’s clothing, toys and gifts—and tells where to buy it.

The 32-year-old Middleton is said to have “The Kate Effect,” selling out any piece of clothing that she's seen wearing. There’s now a “Prince George effect”: The New York Times declared Prince George is “ascending to the throne of trendsetter.”

"Prince George is only 1 but he's had as profound an effect on baby fashion and clothes sales as his mother, with everything he wears selling out in seconds,” editor-in-chief of Mother & Baby magazine Claire Irvin told ITV.com.

In less than a year, the little prince has catapulted several children’s designers to stardom, like Rachel Riley, a London-based kids designer.

“We’ve had celebrity customers before, and we’ve also had royal customers before, but I don’t think we’ve ever had anyone before quite as high profile as Prince George,” Riley told the Times. “Being on such a high-profile baby is very good for business.”

In honor of the little tyke’s first birthday on Tuesday, here’s a roundup of some of Prince George's most fashionable moments.

His Hospital Debut

For his big debut leaving the Lindo Wing of St. Mary’s Hospital, Prince George wore a white shawl by
G. H. Hurt & Son, the same company that had made the blanket William left the hospital in 31 years prior.

Christening

Per royal tradition, the baby heir donned a replica of the christening gown made in 1841 for Queen Victoria’s first daughter.

Family Time

For the royal family’s second official photo, George wore a cashmere sweater (with his name woven on it) by Corgi, a Welsh knitwear brand. The jumper, as the British call it, was a gift to the baby from his grandpa Prince Charles.

“We were thrilled when we noticed that he was wearing our gift,” the company said in a statement. “It was a lovely, natural family photo.”

According to People, the bespoke sweater “could cost up to $832.”

Homeward Bound

Prince George travels in style. The tot looked like a gentleman in red and white pinstriped shorts and a white polo shirt under a red button-down sweater. His Early Days prewalker shoes quickly sold out, too, The Times reported.

WhatGeorgeWore did not identify the maker of the red sweater, but suggested some possibilities: the JJL Kids cardigan and the Petit Bateau Cardigan.

Playdate

One of his most memorable outfits, the sailboat overalls, sold out online “in a few hours, maybe less than that,” according to designer Rachel Riley. Prince George wore the nautical-themed dungarees over a Milo bodysuit by Chelsea Clothing Company from Trotters for his playdate at Government House in Wellington.

Jetplane

Looking a little weary from his three-week long tour in Australia and New Zealand, George still looked stylish. The chubby-cheeked prince wore his signature polo shirt and shorts under a white mohair sweater.

Down Under

The young prince (or more likely, his mother) is a big fan of sailboats—and so is everyone else. The Les Petites Abeilles by Désirée Hohenlohe sailboat romper that George wore in Sydney sold out, too.

Another retailer, Annafie, which sells a similar romper on its site, actually renamed it the “Prince George Romper.”

A Day At The Zoo

Rachel Riley’s outfits for Prince George have been selling out quickly -- like the striped tee and blue shorts he wore to meet the bilby at the Taronga Zoo.

“It’s life-changing,” Riley told The Times. “I love to dress my own children, and I love to dress our customers’ children. But if you asked me if there was one child I’d like to dress, it would be the next heir to the throne.”