Transforming a 67-year old man, Amitabh Bachchan into 13-year old child Auro, suffering from a rare disorder called progeria must have been the most deadly task of the film PAA. He looked completely unrecognizable. It took four to five to put the makeup on Big B’s face and two to three hours remove it. His makeup had eight different layers and Big B wore specially designed dentures to effortlessly replicate the voice of a 13-year old child. All praises Sir Bachchan!