Ranbir Kapoor is currently basking in the success of his latest flick Barfi!. Now, it is heard that the actor and director Anurag Basu have already started working on their next together. Their upcoming film is a biopic on Kishore Kumar.

Buzz has it that Katrina Kaif might play Madhubala in the film.

However, Basu says, “We have not thought of anyone as a leading lady yet. As of now only the three of us (Anurag Basu, UTV and Ranbir) are final.”

Basu says Ranbir was confirmed for the role when they began shooting for Barfi!

“I had locked this film with Ranbir when Barfi! was only one schedule old. I had offered it to him and he liked the idea very much and consented to do it,” Basu told.

The shooting of he biopic will begin late 2013 as Ranbir is currently filming for Kashyap brothers – Besharam with Abhinav Kashyap and Bombay Velvet with Anurag Kashyap.

“The film will have madness of Kishore da. I am lucky that this came to me, UTV was planning this movie, Shomit had written a script. I am a big fan of him. I think he was the most colorful person, so full of life. That’s why we thought of making a biopic on his life. It will be a very entertaining film,” Anurag Basu said.

Ranbir will have to undergo a complete make over to enact the legendary singer/actor.

“We did some look test of young Kishore Kumarji on him (Ranbir). We have gone through several such processes before zeroing in on him to play Kishore da on screen,” Basu said.