Saithan (transl. Demon) is a 2016 Indian Tamil-language action thriller film written and directed by Pradeep Krishnamoorthy. The film stars Vijay Antony in a dual role with Arundhati Nair, Charuhasan, Y. G. Mahendra, Siddhartha Shankar and Kitty amongst others forming the secondary cast. Based on the novel Aaah! by Sujatha, it revolves around a software engineer who gets into trouble after he starts hearing strange voices asking him to kill a woman named Jayalakshmi. The film was released theatrically on 1 December 2016.