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.]
The 13 year old's did the shoot to plug her new movie Super 8, which rolls into theaters this weekend.
In case you're wondering Elle's wearing designs by Jenny Packham, Tim Van Steenbergen, Raquel Allegra in her black and white shots.
[Images courtesy of BlackBook.]