Varun is an Indian film actor and the grandson of Isari Velan. He made a breakthrough appearing in Anthony's Oru Naal Iravil (2015), and has since regularly collaborated in ventures involving A. L. Vijay and Prabhu Deva.
Grandson of actor Isari Velan and nephew of entrepreneur Isari Ganesh, Varun first appeared as an actor by playing the lead role in Sriman's production venture Parimala Thiraiarangam in 2011, under the stage name of Vikaash. Featuring in an ensemble cast including Kishore, Vivek and Sanusha, as well as Arya in a guest appearance, the film ran into production troubles and did not have a theatrical release. Varun subsequently moved on to apprentice as an assistant director under the supervision of A. L. Vijay and worked on the production of Thalaivaa (2013). Vijay requested Varun to consider working as an actor again in his next venture as a producer, with the pair then choosing to collaborate in the thriller film Oru Naal Iravil (2015) directed by noted film editor Anthony. Varun put on fifteen kilograms to play the character of a thirty-year-old auto driver, and appeared in an ensemble cast also featuring Sathyaraj, Anumol and Yugi Sethu. The film did not perform well commercially but won positive reviews from critics, with Sify.com stating Varun did his role with "consummate ease" and the critic from Behindwoods.com stating "Varun does a decent job as the assistant of Sathyaraj".
Varun will make his debut as the leading actor in Prabhu Deva's production venture, Vinodhan co-starring Vedhika and Salony Luthra, where he portrays a character with obsessive–compulsive disorder. Varun was also recommended by Prabhu Deva to appear alongside Jayam Ravi and Arvind Swamy in the fantasy thriller Bogan, by portraying a police officer, for which he put on more weight. Varun will also be seen in a leading role in a third Prabhu Deva production Sometimes as a drug addict, as well as the second lead actor in Neruppu Da with Vikram Prabhu and A. L. Vijay's Vanamagan with Jayam Ravi and Sayyeshaa.