Prince George and Princess Charlotte
Prince George and Princess Charlotte are seen in this undated handout photo taken by Kate Middleton, Duchess of Cambridge, in mid-May at Anmer Hall in Norfolk, England, and made public on June 6, 2015. Reuters/Duchess of Cambridge/Handout via Reuters

Rachel Riley, one of the favorite childrenswear designers of Kate Middleton, has released a special commemorative collection called Royal Party to mark Queen Elizabeth's 90th birthday. All the dresses reportedly look like the kind of clothes Kate and her husband Prince William would like their kids Prince George and Princess Charlotte to wear. Since Kate is an ardent fan of the British label, she is most likely to choose items from the new collection.

Just like their stylish mom, George and Charlotte steal the show and attract attention for the outfits they wear during official outings or photographs. When the royals are pictured in their outfits, the designs sell out quickly — giving rise to the "Kate effect," the "George effect" and "Charlotte effect." However, Charlotte, who will celebrate her first birthday on May 2, has not yet worn a Rachel Riley design.

Two-year-old George already has a few designs from the British label — the cute white shirt with blue trim he wore for his first official portraits with his baby sister. He wore the same outfit for the official portrait with his great grandmother, Queen Elizabeth, grandfather Prince Charles and his dad, on the occasion of the queen’s 90th birthday.

He also has a smocked and embroidered white shirt and red shorts he wore to Charlotte’s christening. Meanwhile, Charlotte who is fourth-in-line to the British throne will turn one on May 2. In most likelihood, an official photograph will be released on the occasion.

And, since 34-year-old Kate and William, 33, love dressing George in Rachel Riley designs, Charlotte could be making her debut as a 1-year-old in one of the designer’s latest designs. In an interview with HFM, Riley spoke about her designs and how the Duke and Duchess dress their kids.

“Diana dressed Prince William in a very traditional way, even more traditional than Kate does with Prince George. George always looks gorgeous, too,” she reportedly said. She added that the toddler’s clothing is very classic but suitable for today's time as it is a more modern version of William’s look when he was a small kid. Riley said she does not get any advance warning that little George would wear her clothes.

The designer reportedly said she always knows when her pieces are ordered. She added that it was an honor that William and Kate chose her designs to dress George.