Thaikku Thalaimagan is a 1967 Tamil-language drama film directed by M. A. Thirumugam.
The film centers on two brothers, Somaiya and Marudhu, who own a family garage business. Their mother favors her eldest son, Somaiya, supporting his actions while making her youngest son feel guilty for not measuring up.
Somaiya becomes infatuated with Nalini, a beautiful but somewhat capricious girl who appears to be attracted primarily by his family wealth rather than any personal qualities. The film stars M. G. Ramachandran as Somaiya and Jayalalithaa in the role of Marudhu.
The movie's soundtrack was composed by K. V. Mahadevan with lyrics penned by Kannadasan, and it was released on 13 January 1967.