The director has again achieved success with his last movie PK, Rajkumar seems to be on a roll with back to back hit films and his next project which will be based on his close pal, Sanjay Dutt will also be a huge hit.
According to latest reports, Ranbir will have to put on some weight as during a certain time, Sanjay was beefed up. That stage of his life when he was going through drug problems and he took to body building in a big way.
The reason for roping in Ranbir is because the actor looks quite similar to the young Sanju Baba, that is during his Rocky movie days.
Rajkumar Hirani said, "It wasn't necessary that we have to find an actor who resembles Sanju. Still, you look at Sanju's picture from Rocky (1981) days and Ranbir's. They both have a similar 'stardom' on their face. Also, if you look at Ben Kingsley (who played Mahatma Gandhi in Richard Attenborough's Gandhi; 1982), he has no real resemblance with Gandhiji. Unlike Gandhiji, Kingsley is tall."
The project came to light recently and work on the film's script has already begun, in fact the makers have been at it for last six-seven months.