Film Krishnakumar made his debut playing the lead role in the film
Kadhalagi (2010). Later in 2020, he played a pivotal role in
Soorarai Pottru as a friend of actor
Suriya's character. In 2024, he gained further recognition and critical acclaim after portraying
Lord Krishna in
Nag Ashwin's
science fiction film
Kalki 2898 AD.
Theater Krishnakumar is the artistic director of
The Little Theatre Group. He has scripted and directed many stage plays, namely the Christmas pantomimes
Alice in iLand (2011) and
The Free Musketeers (2012); and the musicals
Atita (2010) and
Gapsaa - Fully Loaded (2012) for the Little Festival, an international theater festival for young audiences. He was also the theater director of
Kalakshetra Foundation's dance theater production on the occasion of
Mahatma Gandhi's 150th birthday celebration "Shanthi Sutra". ==Personal life==