Ilamai Oonjal Aadukirathu (1978)
Ilamai Oonjal Adukirathu (English: Youth is swinging) is a 1978 Tamil-language Indian feature film directed by C. V. Sridhar. It has Kamal Hassan and Sripriya in lead roles with Rajinikanth and Jayachitra in supporting roles. It had a 175-day run at the box office. The film was later remade in Telugu as Vayasu Pilichindi (1978) and in Hindi as Dil-E-Nadaan (1982).
More at Wikipedia.