Kate stepped out wearing a daring (well by royal standards), off-the-shoulder look by London-based, Brazilian-born designer Barbara Casasola.
Attending the Art Fund Museum of the Year prize at the Natural History Museum in London, Kate wowed in the “figure-sculpting” cream midi which retails for $2717.
The dress was on sale online but appears to have already sold out - although it is still available in black.
Kate accessoried the look with an embellished clutch, suede ankle-strap stilettos and those signature perfect waves.
The Duchess was there to present the Art Fund Museum of the Year 2016 prize and prior to dinner she was introduced to representatives from the five museums shortlisted for annual award.