Rajkumar Hirani is soon expected to start work on Sanjay Dutt’s biopic, starring Ranbir Kapoor. While Ranbir and Sanjay Dutt may not share similar physical attributes, Hirani is confident about his film, “Whenever you make a biopic, you will not get that face 100 percent, beyond a point it does not matter. I feel that Ranbir looks like a star, he knows Sanju very well and also knows all the stories. So at least internally he will be able to play that. And once a person is into the film, it will not make a difference.” Contrary to reports, Rajkumar Hirani has not yet decided on the title of the film.