Elvis Presley's granddaughter Riley Keough is reportedly in talks to appear in the fourth installment of the "Mad Max" series of films. The plot of the film has been kept secret, but the story takes place shortly after the conclusion of "Mad Max: Beyond Thunderdome". The lead character, made famous by Mel Gibson, will be played by Tom Hardy. Charlize Theron and Nicholas Hoult have also been cast. Keough, the daughter of Lisa Marie and actor/misician Danny Keough, made her film debut in "The Runaways" as Marie Currie, the little sister of Cherie.