|Occupation||Actor, standup comedian|
|Genres||Observational comedy, improvisational comedy, physical comedy, political satire|
After earning his Bacherlors' degree, Karthik along with his friend Sunil Vishnu quit their respective jobs and started the event management company "Evam", which today is a theatre company of renown.
Karthik made his acting debut with Alaipayuthey (2000) portraying a small role as Shalini's prospective suitor. He was first tested for the role of R. Madhavan in the film but was rejected as he was too young with no acting experience at the time. He went on to portray supporting roles notably in films like Yaaradi Nee Mohini (2008) and Poi Solla Porom (2008).
In November 2016, Karthik expressed regret for getting typecast in particular roles, and wrote about his "retirement" from the film industry.
Karthik Kumar is also a prolific stand-up comedian who has done three stand-up specials. His first special, "#PokeMe" has more than half a million views on YouTube. His second special was titled "Second Decoction" followed by "Blood Chutney" streaming on Amazon Prime. He has performed over 1000 shows across India, USA, UK, Singapore, Malaysia and Hong Kong. He is managed by Evam Standup Tamasha, a stand-up movement in South India.
|2002||Saathiya||Hindi||Remake of Alaipayuthey|
|2005||Kanda Naal Mudhal||Aravind||Tamil|
|2008||Yaaradi Nee Mohini||Cheenu||Tamil|
|Poi Solla Porom||Uppilinathan||Tamil|
|2010||Sapno Ke Desh Mein||Hindi|
|Kola Kolaya Mundhirika||Krish||Tamil|
|Vellaiya Irukiravan Poi Solla Maatan||Dr. Raghu||Tamil|
- "Wedding bells for 'Mirchi' Suchi!". Sify. 6 October 2005. Archived from the original on 19 August 2014. Retrieved 7 May 2010.
- "All fun and adventure". The Hindu. 11 February 2005. Archived from the original on 6 June 2011. Retrieved 7 May 2010.
- thsgp (9 September 2003). "Their world's a STAGE". The Hindu. Retrieved 15 October 2018.[dead link]
- "Actor Karthik Kumar's confessions are a refreshing take on the film industry". The News Minute. 1 November 2016. Retrieved 15 October 2018.
- R, Aishwarya (12 August 2015). "Karthik Kumar gives the perfect reply". pinkvilla. ISSN 0971-751X. Retrieved 15 November 2017.