Maathu was born in Chennai, Tamil Nadu. Currently, she resides in New York, USA. She was a prominent actress in Malayalam film industry in the years 1980's to 1990's. Maathu's real name of which she was born was Madhavi. She is youngest of three siblings born to Venkit and Santhamma, Tamilian parents in Chennai.
She has an elder sister, Sarala, who was also a child actor and did movie Manassu. Even her aunt was a Malayalam film actress. She married Dr. Jacob, a Malayali based in New York on 12 June 1999. They are parents to two children, Luke, and Jeymi. The couple got divorced later in 2012.
She acted in nearly 50 movies. She commenced her career at a minor age of 4 from the movie Sanaadi Appanna, which starred Dr. in one of the lead roles. She won the Karnataka State Film Award for Best Child Actor (Female) for this movie. She acted in few Tamil, Kannada and Telugu movies in her career.
She worked in hit movies with Mammootty in Amaram and Kuttettan, in Ekalavyan, Mohanlal in Sadayam, Jayaram in Sandesham, and Aayushkalam and Mukesh in Varaphalam.