Kothamangalam Subbu was an Indian poet, lyricist, author, actor and film director based in Tamil Nadu. He wrote the cult classic Tamil novel Thillana Mohanambal and was awarded the Padma Shri. According to novelist Ashokamitran's memoirs, Subbu functioned as the No. 2 of the giant Gemini Studios of Chennai, South India for over three decades and was a close associate of movie mogul S. S. Vasan, who established those studios and published the popular Tamil weekly Ananda Vikatan.

Thillana Mohanambal is a 1968 Indian Tamil-language romantic musical dance film written, directed and produced by A. P. Nagarajan. The film stars Sivaji Ganesan, Padmini and T. S. Balaiah, with A. V. M. Rajan, Nagesh and Manorama in supporting roles. It tells the story of Shanmugasundaram, a nadaswaram player who falls in love with Mohanambal, a Bharatanatyam dancer who reciprocates his feelings, but unfortunate circumstances and their egoistic nature prevents them from confessing their love for one another. How they overcome their self-created obstacles and those created by the people around them forms the rest of the story.