“This is made of success — not everyone can have it,” the actress and comedian Tiffany Haddish said Sunday night, as she held the train on her dress and danced her way through the crowd inside the Wallis Annenberg Center for the Performing Arts in Beverly Hills.

At around 11 p.m., hundreds of people were smiling and nodding and bobbing and weaving their way across a red carpet that snaked its way from Santa Monica Boulevard through the main room of a customized event space where Vanity Fair’s annual post-Oscars party was taking place.

Barry Keoghan, the star of “Saltburn,” stood near the center bar. Lauren Sanchez, the fiancée of the Amazon founder Jeff Bezos, was in front of him, shimmying away to Chic’s “I Want Your Love,” in her reddish, partially see-through chiffon dress.

Never mind that people had been tripping on her train all evening long.

“I don’t mind,” she said. “It just bounces right back up.”

The Vanity Fair party started in 1994 at Morton’s, a celebrity hangout on the corner of Robertson and Melrose. The first few years, only the most famous and connected people in Hollywood were invited.