Arun Vijay (born 19 November 1977), formerly known as Arun Kumar, is an Indian actor who works primarily in Tamil cinema. He also starred in a few films in Telugu, Kannada and Hindi.
Born as Arun Kumar and being the only son of veteran actor Vijayakumar, he debuted in Sundar C's Murai Mappillai (1995). He received early success in Thulli Thirintha Kaalam (1998) and Pandavar Bhoomi (2001).
After a string of failures, he changed his name to Arun Vijay and achieved breakthrough success and recognition for playing lead roles in Malai Malai (2009), Maanja Velu (2010), Thadaiyara Thaakka (2012), Kuttram 23 (2017), Chekka Chivantha Vaanam (2018), Thadam (2019), Mafia: Chapter 1 (2020) and Yaanai (2022). He is noted for his villanous roles in Yennai Arindhaal (2015), Bruce Lee: The Fighter (2015) and Chakravyuha (2016).
He is a recipient of many awards, including a Norway Tamil Film Festival Award, two Filmfare South Awards, a Edison Award and three SIIMA Awards.