Amitabh Bachchan has rendered a song in Sujoy Ghosh's Kahaani. Big B has sung Rabindranath Tagore's Ekla Chalo Re, the music for which was composed by Vishal-Shekhar.

Says Sujoy, "It is one of the biggest highs ever. Mr Bachchan singing a song written by Tagore!" Shekhar says, "Sujoy and I asked Mr Bachchan to sing a track for Kahaani. We played him the track in the studio and he loved it. His voice is magical. I'm a big fan.