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.]
Prada's little sister released a behind the scenes video that shows their "it girl" on set during the shoot.
Press play (above) to see Chloe being silly, licking her lips and pussyfooting around in Miu Miu!