Radha S is an Indian actress who was born in India and is professionally associated with the Tamil entertainment industry. She holds Indian nationality and comes from a South Indian cultural background, with Tamil being her primary language, along with working knowledge of English commonly used in the industry. Details about her exact birthplace, early education, and family background have not been widely documented in the public domain. Radha entered the film industry in the early 2000s and gradually built recognition through her screen presence and character-driven roles. After periods of reduced activity, she re-emerged in television serials, reflecting her continued association with acting. She is active on Instagram under the username radha.s.k, where she shares updates related to her work and public appearances, and she has over 175K+ followers.

Radha’s professional career began with her film debut in the Tamil comedy Sundara Travels in 2002, where she played the role of Vasanthy. The film achieved commercial success and brought her critical appreciation, particularly for her performance alongside established actors. Following this, she appeared in the long-delayed Tamil film Game, released in the same year, portraying the character Jaya. She later featured in a cameo role in Maanasthan in 2004. After a brief gap, she returned to films with supporting roles in Adavadi in 2007, where she played Chandini, and Kathavarayan in 2008, in which she appeared as Sarrosa. These films marked the first phase of her cinema career, after which she stepped away from films for a period.

In addition to cinema, Radha expanded her career into television, which became a significant part of her professional journey. In 2012, she appeared in the Tamil television serial Bhairavi Aavigalukku Priyamanaval on Sun TV, portraying the character Bhairavi. After another hiatus, she made a notable comeback to television with Bharathi Kannamma 2 in 2023 on Vijay TV, where she played Sharmila, gaining renewed visibility among television audiences. She further strengthened her presence with the serial Pavithra, aired between 2024 and 2025 on Kalaignar TV, in which she portrayed Gayathri. Her return to television marked a sustained phase of work from 2023 onwards, highlighting her adaptability and continued relevance in the Tamil entertainment industry.

In her personal life, Radha has largely remained reserved, with limited details shared publicly about her family and relationships. Over the years, she has occasionally been in the media spotlight due to personal matters that became public through news reports, though she later chose to maintain a lower public profile. In recent times, her social media presence reflects a focus on professional commitments, spiritual themes, and selective glimpses into her daily life. She continues to engage with audiences primarily through her television work and public appearances, maintaining a balance between privacy and professional visibility.