Cannes Film Festival was trembling for Austin Butler as the King in Baz Luhrmann’s world premiere of “Elvis.”The film received an uproarious 12-minute standing ovation, the longest of this year’s festival so far.As the the cheers went on and on, a teary-eyed Butler hugged an equally-emotional Priscilla Presley, who flew to the South of France to give her blessing for the movie about her late husband.The Warner Bros. musical drama had Cannes spontaneously erupting into applause as Butler recreated some of Presley’s greatest hits including “Jailhouse Rock,” “Blue Suede Shoes” and “Suspicious Minds.”“Elvis” is one of the biggest titles to screen at Cannes, with a star-studded carpet that included Sharon Stone, Shakira, Kylie Minogue, Diplo and Jeremy O. Harris.