Kate Middleton just wore another £40 Zara dress to the polo

(Image credit: Shutterstock/Rex)

It's official: the Duchess of Cambridge is just as obsessed with Zara as we are.

A mere couple weeks after wearing this off-the-shoulder dress, Kate turned to the high-street store again, this time for an outfit for the polo.

Shop now: STRIPED OFF-THE-SHOULDER DRESS for £39.99 from Zara

She turned up to support Prince William at the charity game, accompanied by Prince George and Princess Charlotte.

Kate seemed to have a great time as she ran around with the kids, looking fab in the striped number, which she teamed with her trademark wedges (the Queen wasn't there, so no style rules were broken, don't you worry).

Unsurprisingly, the £39.99 dress has already sold out, however it looks like they are expecting more stock in certain sizes as you can create an alert for them.

You might just have better luck in store though, so do pop in if you don't fancy your chances online.

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.