Ranbir Kapoor has cleared the air on rumors of him headlining former cricketer Sourav Ganguly`s biopic. At a promotional event for his upcoming rom-com `Tu Jhoothi Main Makkaar`, Ranbir was asked by the media if he is doing a biopic on Sourav Ganguly.  However, he confirmed that he is working on the biopic of the late singer-actor Kishore Kumar.