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 pregnant supermodel wore a black figure-hugging Halston dress and Tom Ford jacket to Mario's exhibit, displaying his In Your Face and British Royal Portraits photography collection at the Museum of Fine Arts in Boston.
She looked lovely, as always, but Mario could NOT keep his eyes off of that baby bump of hers!
Way to be subtle! Ha!
Whatevs, they're good friend and we're sure Gisele didn't mind.
P.S. We see you lurkin', Anna Wintour!
[Image via Elise Amendola/AP Images.]