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!!!
A black-and-white outfit from Rooney Mara? How shocking! LOLz!
The 28-year-old wore a Proenza Schouler dress featuring a black and silver foil print to the New York Film Festival closing-night presentation of her latest film, Her, on Saturday.
Though we've never seen her go for a frock with any silver, Rooney's option stayed in the same vein as her typical red carpet ensems.
We would have loved it if she chose a dress that was a bit more flattering to her slim physique. The pleather bodice looks AH-mazing, but the pleated skirt adds too much volume!
Rooney's favorite black Brian Atwood platforms and simple Jennifer Meyer rings completed her look.
We're definitely expecting her to do better next time!
[Image via Ivan Nikolov/WENN.]