Mumbai, Oct. 9 -- Nag Ashwin's next starring Deepika Padukone and Prabhas just got bigger. The makers of the mega-budget project that will mark the 50th anniversary of Vyjayanthi movies have now roped in Amitabh Bachchan for a key role.

The veteran superstar's addition to the project just makes us even more curious about what the makers are working on. All we know about the film for now that it will be another pan Indian project, possibly one of the biggest ones we have seen so far and reportedly will be a sci-fi drama set against the backdrop of an imaginary third world war. View this post on Instagram

Welcoming with a full heart, the pride of a billion Indians. The Amitabh Bachchan. Our journey just got BIG-ger! #NamaskaramBigB @amitabh...