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 wore the flirty number to the Fruitvale Station photocall at the Cannes Film Festival on Thursday, and it was the perfect outfit for the French Riviera!
It looks soft and breezy, and works so well with Octavia's strappy gold shoes and tousled waves.
Love it from top to bottom and side to side!
[Image via Lia Toby/WENN.]