Punnagai Mannan (transl. King of smiles) is a 1986 Indian Tamil-language musical romantic drama film written and directed by K. Balachander. The film stars Kamal Haasan and Revathi in the lead roles, with Srividya, Rekha, Delhi Ganesh, Sudarshan and Sundar Krishna Urs in supporting roles. Its plot revolves around a dance instructor whose student falls in love with him.

Haasan initially pitched to Balachander a sequel to Ek Duuje Ke Liye (1981). The pitched project was not made but Balachander used elements of its plot to make Punnagai Mannan, a separate project. The film was released on 1 November 1986, Diwali day, and ran for over 25 weeks in theatres, becoming a silver jubilee hit.