Christopher Nolan, winner of the awards for best director and best picture for "Oppenheimer,'quot; at the Governors Ball after the Oscars on Sunday, March 10, 2024, at the Wallis Annenberg Center for the Performing Arts in Beverly Hills, Calif. Advertisement Article continues below this ad The Vanity Fair dress code might be called “loosened black tie” Many still wear their tuxes and gowns from the party. It was the lone Oscar won by