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!!!
Katy Perry looked prettier than the prettiest prima ballerina at the London premiere of Katy Perry: Part of Me 3D on Tuesday.
A Union Jack cocktail ring, matching faux lashes, flawless makeup and a large purple bun accented with a gold chain completes Katy's London look.
What do U think of Miz Perry's English ensemble???
[Image via WENN.]