1975-1979

In Tamil cinema he was initially cast in supporting roles, with his first being that of a cancer patient in Apoorva Raagangal (1975), directed by K. Balachander. It was Balachander who assigned him his stage name Rajinikanth. Though Rajinikanth persistently refers to K. Balachander as his "guru" or mentor, it was director S. P. Muthuraman who actually revamped Rajinikanth’s image entirely. Muthuraman first experimented with him in a positive role in Bhuvana Oru Kelvikkuri (1977), as a villain in the first half and a do-gooder in the second, accepting a woman with a child ditched by her lover.Around this time Mullum Malarum (1978), directed by J. Mahendran, established Rajinikanth on the Tamil film arena. The success of Bhuvana Oru Kelvikkuri prompted Muthuraman to make a mushy melodrama with Rajinikanth as a hero sacrificing everything for his siblings in Aarilirunthu Arubathu Varai (1979). Even while the film was in the making, Rajinikanth had misgivings about whether the audience would accept him in tear jerkers of this kind. But its box-office success made Rajinikanth popular among women audience. These films were the turning points in Rajinikanth’s career — he changed from an actor who merely enthralled the audiences, to one who could also make them weep. The acceptance of Rajinikanth sans his mannerisms proved he had at last become an "actor" from a "star."

His film roles were mainly as a villain during the period 1975 to 1977, usually with Kamal Hassan as the hero, in movies like 16 Vayadhinilae and Avargal (both 1977).