Karthika in Ko: Sensational Kollywood debut Sensational debutant Karthika, daughter of yesteryear actress Radha, is already on Cloud Nine. Ever since the release of Ko (this morning), Karthika has been receiving accolades from all corners. In Ko, Karthika plays the role of Renuka Narayanan, a sincere reporter and Jiiva's love interest. After watching her performance in Ko, it is difficult to believe that this is her first film (in Tamil). Karthika is definitely here to stay and shine in Kollywood. The Jiiva-Karthika on screen chemistry is also widely appreciated by both critics and audiences alike. Interestingly, Karthika made her onscreen debut in Tollywood with Josh opposite Naga Chaitanya. She has also completed her first Malayalam film Makara Manju, which also marks the acting debut of cinematographer Santhosh Sivan. And with Ko, she could not have asked for anything better than this!