Athiran is a 2019 Indian Malayalam-language psychological thriller film directed by Vivek and scripted by P. F. Mathews from a story by Vivek. It was produced by Raju Mathew through his production company Century Investments. The film stars Fahadh Faasil and Sai Pallavi with Atul Kulkarni, Renji Panicker, Shanthi Krishna and Sudev Nair in pivotal roles while Prakash Raj makes a cameo appearance. The film features original songs composed by debutant P. S. Jayhari and a musical score by Ghibran. The story is set in a psychiatric asylum.The film has similarities with the 2014 Hollywood film Stonehearst Asylum.

Principal photography began in November 2018 was completed in January 2019 in a 55-day shoot, extensively shot in Ooty. The film was released on 12 April 2019 two days before the Vishu holiday.