Raadhika Sarathkumar is a Tamil television and film actress, successful entrepreneur and producer. She is the founder of Radaan Mediaworks, which has produced the successful serials Chithi, Annamalai, Selvi, Arasi, and Idi Katha Kadu (Telugu). She is currently acting in the serial Chellamay for Sun TV. She is also a judge on Vijay TV's Jodi Number One.

Raadhika is the daughter of the late Tamil actor and comedian, M. R. Radha (Mohan Rajagopala Radhakrishnan Naidu)and Geetha Radha. Her younger sister Nirosha (Niroja) is also an actress. Actor and politician Radharavi is her elder half-brother. Her mother Geetha is a Colombo Chetty (Tamil caste) from Wennapuwa.

Her first marriage to the malayalee actor cum director,pratap k.pothan, ended in divorce. as did her secound marriage to richard hardy,who is a british national and by whom she has a daughter named rayanna hardy.her third marriage to sarath kumar with whom she has son Rahul. Suhasini Maniratnam, Ramya Krishnan, and Saritha are good friends with Radhika.

Aadhika was discovered by Tamil director Bharathiraja when she was 15 years old. Her first film was Kizhakke Pogum Rail. She has acted in Tamil, Telugu, Kannada, Hindi as well as Malayalam films.

After becoming successful in cinema, Radhikaa decided to take on the small screen. In 1¶994 she set out to produce her own TV software under the Radaan TV banner. After some initial hiccups, the company re-emerged successfully as Radaan Mediaworks Ltd in 1999, and by 2008, had an annual turnover exceeding Rs 10 crore. In 2004, the company ventured into film production in Tamil, Telugu and Hindi markets. Radaan has plans to the Hindi television market. She has acted as the protagonist in several hit serials produced by Radaan Mediaworks. Her first hit drama was Chitti, a 488-episode serial in which she portrayed the main character, Saradha. The serial was widely watched and praised throughout the Tamil-speaking world