Arjun is eldest son of Mr. J. C. Ramaswamy, a noted and popular Actor of Kannada films. His younger brother Kishor Sarja is into direction and his Father-in-Law, Rajesh is also a top notch actor in Kannada movies. Arjun in his initial stage of career dreamt of becoming a police officer and so as to live his dream, he went to police training and got selected as well, but later he made up his mind to become a film star.
Arjun debuted as a film actor with Kannada film Simhada Mari Sainya which was directed by Rajender Singh Babu. He then relocated himself to Telugu and Tamil and concentrated there. His debut in Tamil film was with the movie, Nanri. His famous movies in Tamil includes Otran, Gentleman, Jayasurya, Giri, Jai Hind, and Mudhalvan. Till date he has acted in some 200 movies and the number proves his Stardom. Arjun tried his hands at Direction and Production as well. He has also sung few songs.
He married Asha Rani in 1998 and the couple is blessed with two daughters Aishwarya Arjun and Anjana Sarja.