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.]
Exposing her smooth back in a sequined aquamarine Marc Jacobs dress, Sandy lobs a look of steel into Peter Lindbergh's camera lens.
This is a woman you don't wanna mess with!
Her mother-of-the-bride hairdo is throwing us off a little bit, but hopefully people will be too distracted by the actress's creamy skin to focus on her head!
[Image via Peter Lindbergh/Vogue]