In a recent interview while promoting his upcoming film Bhooth Bangla, the Bollywood actor Rajpal Yadav revealed if he had ever regretted rejecting a role in the film Om Shanti Om and how a misunderstanding with Shah Rukh Khan actually led him to lose the role. Take a look : The actor said that he was initially supposed to play the role of Billu Barber, which was later played by Irrfan Khan, in Priyadarshan's film. It was only much later, during a shoot of another film, that he came to know about his missed opportunity involving Shah Rukh Khan's Om Shanti Om.