But the design is so classic that it's super easy to find without resorting to dropping major cash for the Tom Ford original!
We found two equally affordable options that are super similar to Kate's dress.
Check 'em out ...AFTER THE JUMP!!!
The actress posed alongside Andrea Riseborough in a satin Salvatore Ferragamo dress with asymmetrical hem.
The light gray color makes for a great neutral that goes perfectly with her brown leather clutch and Salvatore Ferragamo sandals.
And with such a neutral colored frock, Freida chose a fabulous multi-colored bib necklace to add some sparkle to all the sheen.
[Image via Getty Images.]