Bollywood actor Ranbir Kapoor is working real hard for his role in Rajkumar Hirani’s upcoming biopic on Sanjay Dutt. After putting on 13kg for the role, new reports have surfaced that the actor plans to stay in a jail for an entire week! Ranbir plays Sanjay in the film.Media reports on Wednesday suggest that Ranbir has reached Bhopal and plans to stay in the city’s jail for a week for a first-hand experience. Sanjay Dutt has spent years in Pune’s Yerwada Jail while serving the sentence for possession of illegal arms.While Paresh Rawal has been roped in for Sunil Dutt’s role, Sonam Kapoor plays Sanjay’s earlier love interest. Vicky Kaushal is his friend from the US, Anushka Sharma essays the role of a journalist and Manisha Koirala plays Nargis, Sanjay’s mother, whose death in 1981 from pancreatic cancer, affected him deeply.The film’s crew, along with Hirani, Anushka, Sanjay and Paresh will reportedly stay in Bhopal till March 12. The shooting of the film began in January.Source: Hindustan Times