Lady Gaga and Joaquin Phoenix basked in the applause as Todd Phillips' villainous musical sequel, "Joker: Folie à Deux," received an 11-minute standing ovation at the Venice Film Festival on Wednesday night.

For the premiere, Phoenix arrived early and worked the carpet liberally, taking selfies with fans. Phillips asked a guest to borrow her paper fan to keep herself cool in the scorching temperatures. Gaga arrived to chants of her name, as the paparazzi created one of the biggest frenzies of this year's festival, with photographers tripping over each other on the carpet to get a shot of the star. One pink-haired fan held up a sign that read, "Gaga, I just want to hold you." The Harley Quinn star needed help maneuvering into her dress, while an attendant reached out to fans and signed autographs in a long line. The premiere also featured big names including CAA CEO Bryan Lourd and Warner Bros. Pictures CEO Mike De Luca.

As Gaga walked down the stairs from the balcony where she was watching the film, she signed autographs for fans, nearly causing a stampede as Italy's Little Monsters shouted, "Gaga, please! Gag, a please!" in hopes of taking a selfie.

The adulation was too much for Phoenix, who left the theater after nine minutes of clapping. He and Gaga were in deep conversation during the standing ovation, apparently discussing the film. Gaga also hugged her fiancé, Michael Polansky, twice during the celebration.