Even the Duchess of Cambridge can't escape one of summer's hottest trends. Tonight, Kate Middleton stepped out for a dinner at the Natural History Museum in London wearing what could possibly be her sexiest outfit to date.

For the occasion, the royal beauty bared her shoulders in a gorgeous white dress by London-based, Brazilian-born designer Barbara Casasola. The stunning off-the-shoulder number is made of stretch jersey and features sheer mesh panels, a zipper up the front, and a flare from the thigh. Princess Kate completed her look with suede ankle-strap Schutz sandals and a sleek metallic clutch, styling her brunette strands in a her signature long, loose waves. Talk about one breathtaking ensemble.

Matt Dunham - Pool/Getty

The Duchess is set to present the Art Fund Museum of the Year 2016 prize at the event, which is awarded annually to one outstanding museum that has shown exceptional imagination, innovation, and achievement in the preceding year. One thing's certain: We won't be getting over this look any time soon.

VIDEO: Kate Middleton's Most Memorable Outfits

To see more of Kate Middleton's most memorable outfits, click the yellow button above to view the gallery.

ncG1vNJzZmivp6x7qrrSrbClnV6YvK57zZ6urGeblsGmecyim52klam8r3nOn51mrJiaerS0zq6jnZ2iYsSptdOeZJ2qlajA