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!!!
Reese Witherspoon looked particularly youthful and glow-y while attending the Pirch store opening in Glendale, CA on Sunday.
If she keeps aging backwards like this, she'll start being mistaken for her doppelganger daughter Ava's twin sister!
The 37-year-old not only gave good face, but also shut it down style-wise in a figure-embracing Antonio Berardi dress featuring an emerald green print jacquard skirt and black lace bodice.
Black Manolo Blahnik pumps and a few pieces of diamond jewelry were the perfect subtle touches.
The outfit is sublime, but the tousled hair and fresh makeup really take the cake!
[Image via Jason Merritt/Getty Images.]