Ranbir Kapoor will be seen as Sanjay Dutt in Sanjay's biopic making by ace filmmaker Rajkumar Hirani. And reportedly after 10 years when Ranbir Kapoor was debuted with Sonam Kapoor in film 'Saawariya', the duo will be seen together in biopic. But she has not to play a full fledged role but a cameo only. The biopic based on the life journey of Bollywood actor Sanjay Dutt in which Sonam has a brief role instead. Ranbir for this role would have to go into an entire transformation to look alike Sanjay Dutt. He is also learning Sanju Baba's walking style as well as talking style. Jackie Shroff will play late Sunil Dutt in Dutt's biopic It's a physically challenging role for any actor to play me : Sanjay Dutt