The news of Sanjay Dutt's biopic movie has been a hot topic since it was announced by director Rajkumar Hirani. The ace PK film-maker has roped in actor Ranbir Kapoor to step into Sanjay's shoes for the movie and play the main lead. And now the role of Snaju's father Sunil Dutt will be played the biggest Bollywood legend, Amitabh Bachchan. Watch the video to see how Big B was roped into this part and what Sanjay Dutt thinks about it.  Show less