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!!!
Rachel McAdams joined her boyfriend Michael Sheen at the London screening of his new movie The Gospel of Us on Wednesday.
Even though it wasn't her night, the 33 year old still managed to be the center of attention in a lace top, high waist trousers and black heels.
The only thing we're not feeling is Rachel's hair. It's just begging to be brushed!
[Image via Lia Toby/WENN.]