After churning out a hit in the name of 'Barfi' with superstar Ranbir Kapoor, filmmaker Anurag Basu signed Ranbir yet again to play the lead role in the biopic of the celebrated bollywood singer Kishore Kumar.

Ranbir, who will be playing the veteran singers role, needs to put on considerable amount of weight in the course of shooting the film to authenticate the later stages of the singer’s life.

Ranbir will first shoot for 'Besharam' with Abhinav Kashyap and then 'Bombay Velvet' with Anurag Kashyap, after which the actor will need months of preparation to play Kishore Kumar's role.

However the weight gain will be required in the later part of the shooting. The actor will be donning three looks in the film to portray three different stages of the singer’s life. "Ranbir will have to put on weight in the course of the character's development. Ranbir will have to play Kishore right from the time he was 19 till he turned 58. It is not going to be easy at all for Ranbir," said director Anurag Basu.