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!!!
Luckily Anne was sitting next to Joseph Gordon-Levitt, who kept her from falling apart at the seams.
The actor posted this picture (above) to his Facebook, stating:
"Annie tore the strap on her dress, but luckily I had a pin :o)"
It didn’t quite match, but we're sure she didn't care since it kept her boob inside her dress!
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[Image via Facebook.]