An upcoming biopic celebrating the life of legendary Bollywood singer Kishore Kumar has been delayed due to problems with the script.

Actor Ranbir Kapoor, who is set to take the role of the iconic Indian vocalist in the unnamed film, has confirmed the project has been stalled until the script is tweaked to celebrate the singer's life "in the best possible way".

Kapoor tells Indian news agency Ians, "He is such a celebrated legend, we believe that unless the script completely celebrates his life in the best possible way, I think it would be wrong for us to touch upon it... so we have kept it aside now.

"We are working on the script and hopefully after we finish (new movie) Jagga Jasoos we will start on it. It will take a while to come to it."

Kumar's songs featured in more than 500 Bollywood films and he also directed and acted in dozens of films from the 1950s until his death in 1987.