As PS-2 releases in theatres, filmmaker Mani Ratnam, spoke to NDTV's Sam Daniel on the making of the two part film. The filmmaker opened about his vision, casting for the project, the film's music and more. The filmmaker was also asked to pick between Kundavai and Nandini, played by Trisha and Aishwarya Rai Bachchan, respectively. Here's what he said. PS-2 is an adaptation of Kalki's best-selling novel Ponniyin Selvan from the fifties.