Indian film director AR Murugadoss won Best Director for his film "Kaththi", starring which actor in dual roles? 
AR Murugadoss: Arunasalam Murugadoss, commonly known with his stage name initials AR Murugadoss, is an Indian film director, producer, and screenwriter. AR Murugadoss:  Murugadoss won the Filmfare Award for Best Director for his 2014 Tamil action-drama film "Kaththi".
i don't know