When Sienna Miller rocked up to the Costume Institute Gala celebrating Anglomania at the Metropolitan Museum Of Art in New York this summer, she probably wasn't aware she'd have the entire nation going for gold this autumn.
She teamed her gorgeous frock with opaque tights and cute patent courts - the stylish way to dress for the new season.
Marks & Spencer has created a fantastic version of this must-have dress for £110, sizes 8-18. But get in quick, it's gonna be a flier.
Visit www.marksandspencer.com
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