Looks like Amitabh Bachchan has started shooting for Kaun Banega Crorepati. On Wednesday, the Bollywood superstar took to his Instagram handle and dropped a picture in which he was seen suited up in a navy blue outfit. Big B was all smiles as he looked into the camera. In the caption of his post, Amitabh Bachchan hinted that he is currently working on something. “At work .. a bit formal .. a bit pre occupied..a bit in the mood to share ..AND WORK CONTINUES .. as it should!” he wrote.