Rajkumar Hirani

Filmmaker Rajkumar Hirani, who on Tuesday launched the much-awaited teaser of Sanju -- a film on the life of actor Sanjay Dutt -- says the experience of making a biopic is very different from a regular future film, especially at the scripting level. Since this is the first time that the filmmaker has made a biopic, that too on a colourful celebrity like Sanjay, who is not only successful and inspirational as a film star but has also had a controversial past, Hirani found it tough.