Some 500 tickets will be available for purchase with a suggested donation of 1,000 pounds each.
Tom Hanks, Goldie Hawn, Diane Sawyer, Sean Penn and Dita Von Teese were among the stars who turned out to honor Roberts in Beverly Hills.
Missoni will receive the prize on Sept. 21.
The season’s fundraising calendar unofficially starts with Rihanna’s Diamond Ball on Sept. 14.
Chinese stars backed out of the amfAR Cannes gala as soon as there was even a slight connection to the Dalai Lama.
Will Smith, Chris Tucker and Jessica Chastain joined emcees Nicole Kidman and Dustin Hoffman on stage at the star-studded 24th edition of the Cinema Against AIDS event, held at the Hôtel du Cap-Eden-Roc.
The annual amfAR gala capped off a busy two days of parties at the festival.
Will Smith, Eva Longoria and Donatella Versace were among the guests, who took in a live performance by Dionne Warwick.
“The Golden Age of Hollywood” is this year’s theme.
Charlize Theron promised to knock back shots with a winning bidder while Jackie Chan offered a cameo in his upcoming film at the fundraiser.
“This is the first time I’ve ever met her. Isn’t that funny? It’s part of a magical thing,” Johansson said.
Johansson and Versace will be honored at this year’s gala on Feb. 8, which serves as an unofficial kick off to New York Fashion Week.
The 2016 amfAR Inspiration Gala honored Charlize Theron and Jeffrey Katzenberg, drawing Jon Hamm, Dita Von Teese, Lea Michele and Heidi Klum.