Here's where you can buy Princess Charlotte's adorable outfit

(Image credit: 2019 UK Press Pool)

This weekend, the Duke and Duchess of Cambridge shared a cause that is close to their hearts: saving the butterflies.

They posted an adorable picture of Princess Charlotte delicately holding a butterfly in her hands on their Instagram feed to illustrate their words.

The caption read, 'We wanted to share these beautiful Peacock and Red Admiral butterflies as part of Big #ButterflyCount initiative taking place across the UK. @savebutterflies are encouraging us all to count these incredible creatures because not only are they beautiful creatures to be around but they are also extremely important. Butterflies are vital parts of the ecosystem as both pollinators and components of the food chain. Hopefully you can beat last year's total, @savebutterflies 🦋'

A photo posted by on

The photo, like most of the Cambridge children's, was taken by their mother Kate. It's unclear when this one was taken, but given Charlotte's summery outfit, it can't have been more than a couple of months ago.

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John Lewis & Partners Kids' Lace Trim Short Sleeve T-Shirt, Bijou Blue, £4-£6 at John Lewis
Designed with playful lace trim detailing, this top from our own collection is a style your little one is bound to love. Made from pure cotton for a soft feel against the skin, it's designed with a crew neck, short sleeves and a pocket to the chest.

The blue t-shirt features a pocket and cute lace details on the sleeve, and the good news is it's still available to buy on John Lewis from just £4.

Princess Charlotte paired it with pink floral shorts and it's the perfect summer combo.

Penny Goldstone

Penny Goldstone is the Digital Fashion Editor at Marie Claire, covering everything from catwalk trends to royal fashion and the latest high street and Instagram must-haves.

Penny grew up in France and studied languages and law at the Sorbonne Nouvelle University in Paris before moving to the UK for her MA in multimedia journalism at Bournemouth University. She moved to the UK permanently and has never looked back (though she does go back regularly to stock up on cheese and wine).

Although she's always loved fashion - she used to create scrapbooks of her favourite trends and looks, including Sienna Miller and Kate Moss' boho phase - her first job was at MoneySavingExpert.com, sourcing the best deals for everything from restaurants to designer sales.

However she quit after two years to follow her true passion, fashion journalism, and after many years of internships and freelance stints at magazines including Red, Cosmopolitan, Stylist and Good Housekeeping, landed her dream job as the Digital Fashion Editor at Marie Claire UK.

Her favourite part of the job is discovering new brands and meeting designers, and travelling the world to attend events and fashion shows. Seeing her first Chanel runway IRL at Paris Fashion Week was a true pinch-me moment.