Revathy known by her stage name "Kadhal" Sandhya, is an Indian film actress who acts primarily in Tamil, Malayalam, Telugu and Kannada films. She made her debut as an actress in the 2004 Tamil film Kaadhal (2004), her performance in which earned her a Filmfare Award and Special Jury Award by Government of Tamil Nadu.
She was born as Revathy to a Chennai.Her father Ajith is an employee of IOB and her mother Maya is a beautician. She has an elder brother, Rahul. She did her primary education at Vidyodaya Girls Higher Secondary School, Chennai. She studied at school until Class 9.
She married a Chennai-based IT worker, Venkat Chandrasekharan, on 6 December 2015. The ceremony was held at Guruvayur Temple because of the floods in Chennai.
Sandhya has said, “We had decided to have our wedding and reception, both in a grand manner. But now with the Chennai and people in flood affected areas suffering from the natural disaster, we have decided to donate the money saved by me for the wedding towards the Chennai Flood relief fund”. The couple were blessed with a girl Shaema Venkat on September 2016.
Sandhya was studying when she starred in the critically acclaimed Tamil love story Kaadhal. Initially, this role was offered to actress Gopika, however, due to other commitments the role was eventually played by Sandhya.
Due to her rising fame, especially after the film Dishyum, her second Tamil film, she had to discontinue her studies before passing her 10th class.