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!!!
Did she and bestie Selena Gomez color-coordinate?
Adorned in jewels, Taylor sparkles with her hair styled in retro curls and her lips painted in classic apple red.
Such a vintage beauty! Gurl just SHUT the red carpet DOWN!! Obviously, we lovelovelove it!!
How much money are you betting on Harry Styles eating his heart out as soon as he sees that sexy plunging neckline?? Ow oww!
[Image via Getty Images.]