Well, the dress has been found ... to be a fake!
The thief who took the gown says he took the dress from Lupita's room at The London after finding the door ajar.
[Image via WENN.]
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.]