Sai Pallavi leads as IPS Nithya Reddy in Om Chapter 1, a Dhanush, Mammootty-starrer action thriller releasing Nov 20. Chapter 1 have released a new teaser introducing Sai Pallavi as IPS Nithya Reddy. The reveal offers a glimpse of the actress in the. Sai Pallavi plays police officer Nithya Reddy in Dhanush's OM, with her character glimpse announced ahead of its November release.