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 Fashion Policewoman looked fab in a cutout Camilla and Marc Resort dress that showed off her skinnier than ever bod.
Two-tone platform Steve Madden heels and a Kotur clutch completed Kelly's cute, S&M outfit.
While there were a lot of celebrity guests in attendance, Kelly O was definitely one, if not THE best dressed.
[Image via WENN.]