"She's so cute, and she looks just like her big brother!" children's wear designer Amaia Arrieta tells PEOPLE

By Monique Jessen
November 30, 2015 01:55 PM
Duchess of Cambridge

Clutching her toes and a favorite toy, Princess Charlotte gave the world a glimpse of her cheeky personality and girly style in official photographs released on Sunday.

“She’s so cute, and she looks just like her big brother!” Amaia Arrieta, one of Princess Kate‘s favorite children’s clothing designers, tells PEOPLE.

The royal mom, 33, dressed her nearly seven-month-old daughter in $16 pink tights from Amaia boutique in London’s Chelsea for the new pictures.

Kate – as well as her sister Pippa and other family members – have frequented the independent boutique in the upmarket area of Chelsea Green since Prince George‘s birth in 2013. In fact, the ribbed tights are from the same collection as those famous knee-high socks that are George’s style signature.

Want to keep up with the latest royals coverage? Click here to subscribe to the Royals Newsletter.

“It’s nice that both kids are wearing the same ribbed tights and ribbed socks,” says Arrieta, adding that while the dress was not from her collection, the outfit looked very European. “A lot of babies wear this style in Spain, up until age 3 to 4, and then you don’t do the frills anymore.”

Kate has certainly been an avid fan of Spanish brands (and frills), having dressed Charlotte in white knitted items from Spanish children’s wear and home goods boutique Irulea for both Charlotte’s first official photo and for her hospital departure in May.

And of course, the cotton tights (she has at least four pairs) matched perfectly with Charlotte’s pale-pink cardigan worn over a floral-print cotton dress, complete with smocking and frilled collar (two details Kate also bought for George). There’s even a hint of the same side-parting of her big brother.

As for the fawn-colored toy that features adorably alongside Charlotte, it appears to be the “Fuddlewuddle Puppy” from Jellycat, where it sells for about $28.