At Vanity Fair's Oscar Party, Everyone Is Someone Kevin Mazur Nat Faxon and Jonah Hill attend the 2012 Vanity Fair Oscar party. A CHAMPAGNE cork popped. Rooney Mara, in her lacy white gown and sweep of black bangs, was at the bar, which was crowded three deep. In the hallway, Jonah Hill was cracking up Elizabeth Olsen and her date, with the "Moneyball" director Bennett Miller looking on. Shaun White strode by, his red curls tightly bound in a small ponytail. Jeffrey Deitch, the director of the Museum of Contemporary Art, Los Angeles, rubbed elbows (literally) with Owen Wilson, who was leaning on a banquette next to Malcolm McDowell. As reliably as ever, Graydon Carter's Vanity Fair Oscars after-party was a celebrity cross-pollination, a glossy who's who with a couple of dozen Oscar winners, shiny statues in hand, circulating gleefully. It's the valedictory stop on the circuit, even for people who have their own parties. Harvey Weinstein and his wife, the Marchesa designer Georgina Chapman, arrived around 1 a.m., after celebrating the many wins for "The Artist" at the Weinstein Company fete. The gang from "The Descendants," save for George Clooney, came with their families, after a party given by Fox. The retro air of the Academy Awards carried over to the Sunset Tower Hotel here, with old-fashioned photo booths and, new this year, cigarette and candy girls in cream mini-dresses designed by L'Wren Scott roaming a tented area with their trays of vice. If Mayor Antonio R. Villaraigosa of Los Angeles had a problem with all the people puffing around him, he didn't mention it. Sean Combs had his arm around Cameron Diaz, now in a candy orange tank gown, sharing a booth with Jane Fonda. Rosario Dawson began dancing as soon as a Whitney Houston song started. There were comedy and music klatches: Steve Martin talking to Catherine O'Hara and Maya Rudolph; Bret McKenzie, an Oscar winner for the song "Man or Muppet," and his wife, Hannah Clarke, having a moment with the soul singer Robin Thicke and his wife, the actress Paula Patton. Elton John stopped by after his own viewing party, and the photographer Terry Richardson excitedly asked for a photo (they'd never met). Brett Ratner, who had to bow out as an Oscar producer this year after making an anti-gay slur, gave the telecast, produced by Don Mischer and Brian Grazer, a thumbs up. "I think it went well," Mr. Grazer said, "so I'm relieved." Tim Tebow, in a dark shirt open at the collar to reveal a cross on a chain, admitted he hadn't seen many of the Oscar-nominated movies, though he was a fan of "Moneyball." He was inundated with requests for photos. "It's cool," Mr. Tebow said. I like meeting new people. It's always an honor. Jean Dujardin arrived in the wee hours and had a doubly surreal moment, watching his best-actor acceptance speech play out on a reel at the party. He had a glass of Champagne and a cigarette and posed for a photo with the Oscar head in his mouth. His night appeared to be just beginning, as it was for Dan Lindsay, a director of "Undefeated," the Oscar winner for best documentary. It counts Mr. Weinstein as a backer and Mr. Combs as a producer. "I'm not going to sleep," Mr. Lindsay said at 2 a.m. Diddy told us backstage that he was going to show us the craziest 48 hours of our life.