But the royal seemed to taken inspiration from one of the country's most famous actresses – Naomi Watts.
The Oscar-nominated star was pictured wearing the exact same designer dress in her Jacob's Creek wine campaign, posing in Australia's wine region Barossa Valley in the pretty number.
While Kate teamed hers with drop pearl earrings, a silver watch and her trademark cascading curls, Naomi had styled hers much more casually, with loose tousled waves and a simple leather bracelet.
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