Did Princess Charlotte wear Prince George's hand-me-downs in her birthday pics?

In honor of Princess Charlotte's fourth birthday Thursday, Kensington Palace released brand-new photos of the young royal. But there's something particularly familiar about one of them.

Charlotte, the fourth in line to the British throne, appears to be wearing a pair of sneakers that once belonged to her big brother, Prince George.

The palace released three photos of Charlotte, each taken by her mother, Catherine, Duchess of Cambridge, on the grounds of Kensington Palace and at the family's country home in Norfolk.

In one of the photos, Charlotte is sitting on the grass and wearing a light blue floral dress with a pair of navy canvas shoes. The laceless kicks look just like the ones spotted on her big brother, Prince George, at a charity event last June.

Photos of the two from the event show the pair running around a field, George wearing the navy shoes and Charlotte ... barefoot! Some fashion sites are already pointing out where admirers can purchase the same pair of shoes. The sneaks are remarkably affordable ($35), prompting some to wonder whether Charlotte is wearing her brother's castoffs or if her mother purchased her a new pair.

Of course, the duchess is known for recycling her own outfits — and for dressing her kids in hand-me-downs.

Last year, in photos showing Catherine cradling her then-newborn baby brother, Prince Louis, the young princess wore a navy blue cardigan that George donned in a 2016 portrait with the children’s great-grandmother, Queen Elizabeth.

But that wasn't the only hand-me-down in the photo. Louis was wearing an all-white knit outfit that his sister wore years earlier when she was the newborn.

All the photos were taken by the Duchess of Cambridge, who features her photography skills every time one of her children celebrates a birthday. Just a few weeks ago, photos were released in honor of Louis' first birthday.

Of course, all the children will soon have an opportunity to pass along all their hand-me-downs to another royal. Their uncle, Prince Harry, and his wife, Meghan, Duchess of Sussex, are expecting their first child in just a matter of days.