She was born in Surat, India. Her father is a textile businessman and her mother is a housewife. Her dad ran a Raymonds Showroom. She did her B.A. in MTB Arts College. She was crowned Miss Surat during the year of 1998. She went on to participate in the 2001 Miss India pageant and ended up as the fourth runner-up. She competed in the Miss India 2001 pageant and made her film debut in 2002.
She made her acting debut in the Telugu film Gemini but Sontham directed by Sreenu Vaitla got released first. Subsequent to that, she starred in the Tamil film Aai. In 2006 she made her Bollywood debut in the Hindi film Love Ke Chakkar Mein. She starred in Tamil Film "Aai" the song "Arjuna Arjuna" along with Sarath Kumar, which ended up as a big hit. This movie dubbed in Hindi as Nayi Baazi. Her screen name for the first two Telugu movies was Bhairavi. She has also appeared in an English film named Maya directed by Eric Manning. Her upcoming movies encompass Love College, Pottu, Puli Murugan, Fire, Miss Chintamani MA, Bhagavan MLA, Sikkapatte Istapatte, Bhaaja Bhajantreelu, Sukra.
Namitha has been an advocate of safe driving and in June 2012. She also involved in charity work and has a soft corner for HIV effected kids and often Aids them in Pondecherry Communicable Disease center. Namitha also sponsored public toilet projects in commercial areas of several states, mainly for ladies.