Amitabh Bachchan has joined the cast of filmmaker Nag Ashwin's upcoming film, which will also star actors Deepika Padukone and Prabhas. "Welcoming with a full heart, the pride of a billion Indians. The Amitabh Bachchan. Our journey just got BIG-ger!" film's production house Vyjayanthi Movies tweeted. "Finally, a dream coming true," Prabhas wrote on Instagram.