Silambarasan was born on 3 February 1983 in Chennai, Tamil Nadu, as the eldest child of T. Rajendar and Usha Rajendar. He has a younger brother Kuralarasan, and sister Ilakiya. He studied at the Don Bosco Matriculation Higher Secondary School and St.John's International Residential School.[9] Simbu entered the film industry from a young age and acted in many of his father's films until 2002, when he acted in Kadhal Azhivathillai, his first main role as a hero.