Karthika Nair is an Indian film actress of the South Indian film industry. She made her debut in the 2009 Telugu film, Josh opposite Naga Chaitanya. She rose to fame starring in her second and her first successful Tamil film Ko opposite Jiiva.
Karthika was born to former Indian actress Radha, and is the niece of actress Ambika. She has two siblings, a brother and a sister, Thulasi Nair, who is also a South Indian actress. She did her schooling in Podar International School in Mumbai and is now studying an international degree in Business from college affiliated to London School of Economics.