Arun Kumar was born to actor Vijayakumar and Muthulakshmi.He recently changed his name from Arun Kumar to Arun Vijay.He is married to Arthi. She is the daughter of Dr N.S.Mohan and holds a post-graduate degree in psychology. His sisters are movie actresses too. Vanitha, Preetha & Sridevi.Preetha is married to Hari, famous direct of Sammy fame. The Younger sister Sridevi got married recently and was attended by personalities from the Kollywood.