Since the announcement of the film, there have been numerous reports related to Ranbir's look in the film. Some have claimed that he will put on weight for his character and some have claimed that he will grow his hair for the part, though none of the reports have been confirmed yet. Numerous reports have also claimed that Ranbir has been interacting with Dutt to learn more about his life and mannerisms.
Sanjay Dutt, however, opened up about the biopic at the Young FICCI Ladies Organisation's event in Delhi where he was accompanied by his sister Priya Dutt and Pooja Bhatt.
About the biopic, Dutt was reported as saying, "My life might be interesting, that's why a director like Raju Hirani liked it. Ranbir is playing me, but his condition is quite bad. He calls me everyday. He wants to spend days and weeks with me, but I can't spend more than half an hour with anybody. I have been trying to avoid him, it is a difficult role for him to play. He is a fine actor though."
Pooja also said, "Tell Ranbir that this is not how it works. You have to live, you have to fall, no one can become Sanjay Dutt like that. The generation today, nobody says anything without a PR person, nobody steps out without a stylist. When Sanju cut his hair in that mohawk style and wore that ganji, it became a rage. I don't think that just by spending weeks with Sanjay, Ranbir will be able to play him. Maybe he needs a few more knocks."
The biopic is also set to star Anushka Sharma and Sonam Kapoor.