Sonia Agarwal is an Indian actress known for her works predominantly in Tamil cinema and a few Telugu, Malayalam and Kannada films. She is best known for her performances in films such as Kaadhal Kondein (2003), 7G Rainbow Colony / 7G Brindavan Colony (2004) and Pudhupettai (2006).

Kaadhal Kondein is a 2003 Indian Tamil-language romantic psychological thriller film written and directed by Selvaraghavan, credited as his directorial debut. The film stars his brother Dhanush and newcomers Sonia Agarwal and Sudeep Sarangi, while Nagesh and Daniel Balaji play supporting roles. The film, which has music scored by Yuvan Shankar Raja and cinematography handled by Arvind Krishna, released on 4 July 2003, becoming a critical and commercial success upon release. The film is considered a breakthrough for Dhanush as it catapulted him into the league of lead actors in the Tamil film industry.