Mohan made his acting debut with the Kannada movie Kokila in 1977 alongside Tamil Actor superstar, Kamal Haasan. Kokila was a huge hit and Mohan was propelled into the limelight. After his film Moodu Pani in 1980 he has become one of the biggest role model of the Tamil cinema industry. He is fondly called the "Silver Jubilee Star" and also "Rajendra Kumar" of Tamil cinema, since almost all movies in which Mohan starred enjoyed a fantastic run.
From late 70s to early 90s, the Mohan sensation swept the Tamil movie world off its feet and the frenzy he generated was something which has never been seen before. He kept on delivering super one after the other, the women all over the South fainted over him. Mohan was the biggest super star of his time and he not just matched but surpassed the two legends Rajnikanth” and ”Kamal Hasan”. He holds a unique record in the industry for delivering more than 25 silver jubilee hits, a feat where he is leading by a great margin.