Princess Diana redefined the royal dress code. From her high-fashion wardrobe to her willingness to take sartorial risks (shorter hemlines, lower necklines … the list goes on), she quickly became a style icon. To celebrate the late Princess of Wales’s 57th birthday on Sunday, July 1, we’re looking back at some of our favorite Princess Di outfits.

Princess Diana style

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Princess Diana 1996 Met Gala

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Andrea Lavinthal, Style and Beauty Director: Princess Di was doing thered dress, red shoes look way before Reese, Blake and Gigi. In 1995 (post-separation from Charles), she stepped out in a head-turning crimson Christian Lacroix dress, paired with coordinating accessories (including red nails!) in Paris.

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Princess Diana style

Princess Diana style

Colleen Kratofil, Style Writer-Reporter:Just likePrincess Kate today, Princess Diana did casual polo-watching outfits better than anyone else (sorry,polka dot dress fromPretty Woman). She made a mom-tastic print sweatshirt and jeans look incredibly chic with an oversize blazer. And even her equally casual cap is a fun accessory that pulls together her laid-back look. Though the cowboy boots at a polo match are a little puzzling, I think it still works thanks to the whole “riding jacket vibe.”

Princess Diana style

Princess Diana style

source: people.com