Karunas who use to don comedian roles started donning hero roles. The film Dindigul Sarathy which had him in the lead role was a great hit. After that he continued to don lead roles in the film Ambasamudaram Ambani, Chandamaama, Ragalapuram and Lodduku Pandi.
After that he did not get offers for the lead roles. Hence he has now switched over to comedian roles and character roles. He donned an important character role in the recently released film Azhagu Kutty Chellam. He has now started acting in comedian roles.
Now he is donning the comedian role in a film which has Santhanam in the lead role. The film is titled Enakku Innoru Peyar. He is donning the role called Facebook Mohan. This is a full length comedy film. Moreover he is donning the comedian roles in numerous films including Puzhal.