Haasan's father, D. Srinivasan was a lawyer and mother's name is Rajalakshmi .He is the youngest child in his family; his brothers Charuhasan (born 1930) and Chandrahasan (born 1936) are also lawyers, and Charuhasan became an actor during the 1980s. Haasan's sister, Nalini (born 1946), is a classical dancer. He received his primary education in Paramakudi, Ramanathapuram District, and then moving to Madras (now Chennai) as his brothers pursued their higher education. Haasan continued his education in Santhome, Madras; attracted by film and the fine arts, he was encouraged by his father. When a physician friend of Haasan's mother visited Avichi Meiyappa Chettiar (AVM) to treat his wife, she brought Haasan with her. Apparently impressed by Haasan's demeanor Suresh Madhavan, M. Saravanan (AVM's son) recommended him for their upcoming production Kalathur Kannamma.
He made his 100th film appearance in 1981 in Raja Paarvai, debuting as a producer. In 1986, Haasan produced the technically brilliant Vikram and collabarated with Kodandarami Reddy for Oka Radha Iddaru Krishnulu and then K. Vishwanath in Swathi Muthyam, playing an autistic person who tries to change society; it was India's entry for Best Foreign Language Film at the Academy Awards in 1986. He then produced and starred in Unnaipol Oruvan. His production company (Rajkamal International) has produced several of his films.
He was born into a Tamil Iyengar Family in the town of Paramakudi, in the Ramanathapuram district of Tamil Nadu, to criminal lawyer D. Srinivasan and Rajalakshmi a housewife. On the show Neengalum Vellalam Oru Kodi, he stated that his parents originally named him Parthasarathy and his mother always used to call him by that name. He was the youngest of four children; his siblings are Charuhasan, Chandrahasan and Nalini (Raghu). His two older brothers followed their father's example and studied law. Chandrahasan has produced several of Haasan's films and is an executive with Rajkamal International. Chandrahasan's daughter Anu Hasan has had supporting roles in several films, including Suhasini's Indira. Haasan's sister, Nalini Raghu, is a dance teacher for whom he named an auditorium (Nalini Mahal). Her son, Gautham, played Haasan's grandson in Hey Ram.