Born: Madras, Tamil Nadu, India
Selvaraghavan is the son of film director Kasthuri Raja, elder brother of actor Dhanush and has two sisters, who are both doctors. On 15 December 2006, he married actress Sonia Agarwal, with whom he had previously worked with on three films. After their two year marriage Sonia Agarwal and Selvaraghavan filed for divorce with mutual consent in a Chennai family court on 9 August 2009. Two years later, Selvaraghavan became engaged to Gitanjali, daughter of a former Advocate General of Tamil Nadu P. S. Raman.
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