The Zimmermann Roamer Day Dress, which went on sale last month, looked just as stunning on the 32-year-old royal for a second time.
But Kate swapped her previous tanned wedges for a pair of nude stilettos for the grand slam.
The Australian designer dress, which has also been worn by actress Naomi Watts, retails for $495.
It certainly has been a hit with the Duchess and the royal seal of approval will no doubt help sales and the brand’s publicity.