Princess Kate shared an adorable snap of the family to mark Prince William's 42nd birthday.
The royal mum, 42, shared an adorable snap of Prince William and their three children on the beach enjoying the summer weather.
But eagle-eyed fans who saw the post on their official Instagram account spotted Charlotte's new fashion accessory for the summer.
The fun action shot shows Princess Charlotte, Prince Louis and Prince George holding hands as they leap from a sand dune.
Kate wrote a heartwarming message alongside the snap, which she took herself, it read: "Happy birthday Papa, we all love you so much! Cx"
Nine-year-old Princess Charlotte looked just like her mum in a Breton striped top and shorts, with Kate loving a navy striped top for her more casual looks.
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She finished the look with a new piece of jewellery never-before-seen and fans loved the adorable addition.
The young girl wore an adorable anklet to finish her beach look off on her right ankle.
At closer look, many fans revealed it looked like an adorable little daisy chain.
An anklet is synonymous with summer and is a great way to elevate any outfit and add a bit of glam.
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And if you want to follow in the young royal's footsteps than you are in luck.
You can buy a similar chain from for just £39.
Royal fans were quick to take to X, formerly known as Twitter, to comment on her new jewellery and how great it looked in the family snap.
The picture appears to be from a beach in Norfolk, where the family have their country home.
One person wrote: "Charlotte is chic, she wore an anklet."
Another commented: "I see Charlotte with her bracelets and anklet."
"I just adore Princess Charlotte with her daisy chain anklet," penned a third.
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Meanwhile a fourth said: "Love her little anklet, every little girl in the world will be buying those out immediately."
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Someone else added: “I notice that Princess Charlotte has an anklet around her ankle, so cute."
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