Amitabh Bachchan, a witty brat?

He has played a variety of roles in his career spanning four decades in Bollywood but megastar Amitabh Bachchan has turned the clock back by his latest avatar of a 13-year-old "witty brat" in director R Balakrishnan's upcoming film Paa.

He has played a variety of roles in his career spanning four decades in Bollywood but megastar Amitabh Bachchan has turned the clock back by his latest avatar of a 13-year-old "witty brat" in director R Balakrishnan's upcoming film Paa.

"I think he has done a phenomenal job in playing the 13-year-old. Although intelligent and witty, he is playing a brat in the film. He is not spoiled but he is a brat," said adman-turned-film director Balakrishnan.

The 67-year-old star will be essaying the role of a child suffering from progeria, which accelerates ageing.

International make-up artist Stephan Dupuis, who did Robin Williams' make-up in Mrs Doubtfire, was roped in to give Bachchan the special look in the film.

With blood veins prominent on his bald head and broken teeth, the actor looks five times his age as the 13-year-old 'Auro'.

"The look is a very interesting one. It's a very authentic reflection of progeria patients and that is why the look works so well," Balakrishnan, popularly known as Balki, said, adding that managing Bachchan's appearance was not a daunting task for him.