[3] He has featured in both seasons of the comedy webseries Amazon Prime Video's Chacha Vidhayak Hain Hamare.
At age twelve he moved to Delhi and studied at Sarla Chopra DAV Centenary Public School, Noida.
He completed his engineering in biotechnology degree from Shanmugha Arts, Science, Technology & Research Academy, Tanjore in 2008.
[9] Between 2017-2020 Kumar took roles across web series and shorts including Anirban in Better Life Foundation,[10] Kranti in both seasons of Amazon Prime Video's Chacha Vidhayak Hain Hamare, Babloo in DisneyPlus Hotstar's PariWar[11] and the titular Buddhaditya Das in Mr. Das.
[citation needed] In 2022 Kumar Varun alongside Tanmay Bhat, Richa Chadda, Gopal Datt, Vijay Varma appeared in two seasons of Farzi Mushaira.