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 Russian beauty hammed it up for the cameras in a white Versace one shoulder studded dress and silver strappy sandals.
We're baffled at how Irina can make the simplest of things so sexy!
[Image via Sean Thorton/WENN.]