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 Wish I Was Here starlet glistened in a silver Versace gown with a sexy, deep-v plunging neckline and a dramatic cape accent.
Though Kate still was styled flawlessly with Old Hollywood waves and a silver clutch, but blew us away with a sparkling rock on her finger.
Way to put those engagement rumors to rest!
Slay, Kate, slay!
[Image via AP Images.]