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. Kaththi:  The film stars Vijay in dual roles while Samantha Ruth Prabhu, Neil Nitin Mukesh, Tota Roy Chowdhury and Sathish play supporting roles.
i don't know