Murugadas Arunachalam, known professionally as AR Murugadas, is an Indian film director, producer and screenwriter who predominantly works in the Tamil film industry. He is best known for directing action films mainly on social issues. In addition, he has worked in Telugu films and Hindi films. Murugadoss won the Filmfare Award for Best Director for his 2014 Tamil action drama Kaththi.

Sarkar (transl. Government) is a 2018 Indian Tamil-language political action film written and directed by A. R. Murugadoss, and produced by Kalanithi Maran of Sun Pictures. The dialogues were co-written by Murugadoss and B. Jeyamohan. The film stars Vijay, Keerthy Suresh and Varalaxmi Sarathkumar in the lead roles, while Yogi Babu, Tulasi, Radha Ravi and Pala. Karuppiah play supporting roles. It follows Sundar Ramaswamy, a corporate raider, who arrives in Tamil Nadu from the United States to cast his vote in the Tamil Nadu Legislative Assembly election, only to find that his vote has already been recorded as cast, which leads him to raises awareness against electoral fraud and contest as a non-partisan politician in the elections amidst several attempts made on his life and reputation.