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 Bridge star looked perfectly at ease with her hands in the pockets of her strapless plaid dress at the Hollywood Press Association Luncheon in Beverly Hills on Tuesday.
Her Stuart Weitzman sandals were pretty simple, but it was her side ponytail that really earned our seal of approval.
Keep being awesome, Diane!
[Image via AP Images.]