Sienna Miller’s £29.99 H&M sundress is the ultimate holiday buy

There are few things more satisfying that a reminder that celebrities love the high street as much as the rest of us. Whether it’s The Duchess of Cambridge’s latest Zara purchase or Susanna Reid’s M&S dresses, we love getting fast fashion inspiration that we can actually follow.

Sienna Miller’s sundress, which she was spotted wearing while out and about in New York City this week, is another perfect example. The strappy, calf-length cotton number (in on-trend gingham, no less) is perfect for casual summer weekends or packing in your holiday suitcase – and at just £29.99 from H&M, it’s easy to get Sienna’s laid-back style on a budget.

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The actress and fashion designer teamed her affordable frock with a white shoulder bag and statement yellow shoes with a small block heel, for an effortless seasonal look.

However, you could throw yours on with sandals and a basket bag for a beachier take, too – just add a pair of sunglasses atop tousled hair, and you’ll be good to go. Or if you’re not keen on baring your arms? Layer the strappy dress with a plain white tee.

When she first arrived on the fashion scene in the noughties, Sienna was known for the penchant for bohemian chic, and now aged 36 still says that she has a relaxed approach to dressing. ‘I really admire people who can put on a full look, but I am not one of them,’ she explained during an interview with Harper’s Bazaar.

H&M

Sundress, £29.99, H&M

However, these days her choices are more classic, less trend-led – as a certain basic sundress demonstrates. ‘The mini-skirts and stuff… It was great and I was in my twenties, but I’ve grown up a little bit,’ she added to the title. ‘I love classic fashion; for now, I’m in a toned down, mellow state.’