Radhakrishnan made her debut as a child voice actor in a film for Sujitha and continued for many movies as a voice actor in both Tamil and Telugu movies. She later as a teen dubbed for female lead actress
Vinodhini for a Tamil movie Annai Vayal (1992). Her major break was with
Jeans lending her voice to
Aishwarya Rai's character. An M.B.A. graduate who majored in advertising from
Annamalai University, she first received attention when the Indian cinema director
Shankar selected her to lend her voice for the then
Miss World Aishwarya Rai in
Jeans. In
Telugu, her first work was for
Simran in
Kalisundam Raa and later she went on to lend her voice for Simran in all most all her movies. She has lent her voice for
Aarthi Agarwal from her debut film
Nuvvu Naaku Nachav, "I got the Nandi award for this movie," recalls Radhakrishnan. She lent voice for
Trisha's first Telugu film,
Varsham,
Richa's in
Nuvve Kavali, and for
Asin in
Amma Nanna O Tamila Ammayi, she lent her voice a lot for
Simran,
Jyothika and
Trisha. Her major works are
Thullatha Manamum Thullum,
Kushi,
Priyamanavale,
Panchathantiram,
Dhool,
Chandramukhi, and
Sillunu Oru Kaadhal. In the movie
Deiva Thirumagal she lent her voice for Amala Paul whereas her daughter lent her voice for
Sara Arjun. She lent her voice for
Jyothika in the
Tamil film
Chandramukhi, and subsequently dubbed for
Kangana Ranaut in
Chandramukhi 2. She has dubbed for
Simran and
Jyothika in the same film,
12B. She had also lent her voice for the actress playing Nina's character in
Chitti serial. In
Parthiban Kanavu she lent her voice for
Sneha for one of her dual appearances. ==List of movies dubbed==