The movie, directed by Priyadarshan, has SRK playing a filmstar and Irrfan Khan playing a barber from village. The story is apparently inspired from the legend of Krishna-Sudama friendship.
Says a source, "Though Kareena and Shah Rukh haven't done any films together; after Asoka and Don, their chemistry has been sizzling.
So when Shah Rukh, who plays a superstar in Billoo Barber, asked her to perform to a song with him, she agreed. Kareena is keeping dates aside and will soon be shooting for the song by next week.
‘Billoo Barber' also had Amisha Patel playing Irrfan Khan's wife, but the actress recently bowed out of the project because she presumably did not find her role substantial.