We Can't Stop Staring at Kate Middleton's Totally Unexpected Green Lace Dress

This is definitely one of our favorite gowns that Kate Middleton has ever worn.

The Duchess of Cambridge attended the 2017 Portrait Gala that was held at the National Portrait Gallery in London tonight, and she dazzled in forest green. For the formal occasion, the royal chose an elegant Temperley London dress that featured a sheer floral lace overlay, delicate long sleeves, and a thin bow-adorned belt that accentuated her waist. She paired the statement piece with Kiki McDonough pink tourmaline and green amethyst drop earrings, a beaded Wilbur & Gussie envelope clutch, and metallic Jimmy Choo platform sandals. Talk about a show-stealing look.

The Duchess of Cambridge attended the 2017 Portrait Gala in London wearing an elegant green lace Temperley London gown. She paired the dress with Kiki McDonough drop earrings, a beaded Wilbur & Gussie envelope clutch, and metallic Jimmy Choo platform sandals.

Eamonn M. McCormack/Getty

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Middleton—who has been a patron of the National Portrait Gallery since 2012—took a tour of the current exhibitions at the event, viewed a collection of specially commissioned pieces for the fundraiser, and also sat down to dinner with a star-studded group of attendees that included Alexa Chung, Sophie Ellis-Bextor, Donna Air, and more.RELATED: Kate Middleton Sends Her Thoughts to Victims of Westminster Attack

See all of Princess Kate's most memorable style moments in our gallery.