Loose Mohan, whose original name was Arumugam Mohanasundaram, was born in 1928 in Kanchipuram. Being the son of actor Arumugam, he started acting in films at the age of 16. His first film is said to be Harischandra, which starred PU Chinnappa. However, he got a big break in the movie Rosapoo Ravikaikari, which starred Sivakumar. In his long career, he acted with present generation superstars like Rajinikanth and Kamal Hassan.
The veteran comedian acted not only in Tamil films but also in Telugu, Kannada, Tulu and Marathi. His last film was Parthiban and Nandita Das starrer Azhagi way back in 2002.