Thillu Mullu is a 1981 Indian Tamil-language comedy film directed by K. Balachander and written by Visu. A remake of the 1979 Hindi film Gol Maal, it stars Rajinikanth, with Thengai Srinivasan, Nagesh, Poornam Viswanathan, Sowcar Janaki, Madhavi and Viji Chandrasekhar in supporting roles. The film is about Chandran, who lies to his boss to get a leave but gets caught. To save his job, he is forced to pretend to his boss that he has a twin brother.

Plot

Aiyampettai Arivudainambi Kaliyaperumal Chandran is a graduate in search of his first job. He and his sister Uma have no relatives or acquaintances except their doctor/family friend. The doctor advises him to attend an interview for a job at his friend Sriramachandramurthy's import-export company. Sriramachandramurthy is a man of traditional values. He is a sports fan but thinks lowly of youngsters involved in sports. He believes that men without moustaches are characterless.