One is a 2021 Indian Malayalam-language political drama film directed by Santhosh Vishwanath and written by Bobby–Sanjay. The film stars Mammootty in the lead role, alongside an ensemble cast including Mathew Thomas, Murali Gopy, Siddique, Joju George, Ishaani Krishna, Gayatri Arun, Nimisha Sajayan, Madhu, Balachandra Menon, Ranjith, Shankar Ramakrishnan, Salim Kumar, Jayakrishnan, Jagadish, Binu Pappu, Jayan Cherthala, Sudev Nair, Krishna Kumar and Vivek Gopan.