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.]
Oddly enough, the supermodel covered up for the event, opting for a black Mark & Spencer's Autograph peplum dress that she accented with a belt and nude pumps.
Rosie finished off her flawless look with natural makeup, long wavy locks and perfect pouty lips.
Such a pretty petal, isn't she!?
[Images via Zak Hussein/Lia Toby/WENN.]