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

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.