Alaigal Oivathillai is a 1981 Indian Tamil-language teen romantic drama film directed by Bharathiraja and written from a story by Manivannan.
The narrative centers on a Hindu boy who falls in love with a Christian girl, facing societal obstacles as they strive to unite.
The film features debut performances by Karthik and Radha, alongside Thiagarajan, Silk Smitha, and Kamala Kamesh in supporting roles.
Key crew members include cinematographer B. Kannan, editor R. Bhaskaran, and composer Ilaiyaraaja.
The film was produced simultaneously as its Telugu version "Seethakoka Chilaka" (1981), with Karthik and Radha reprising their roles for that counterpart.
Filming took place entirely in Muttom, Kanyakumari. The movie was released on 18 July 1981 to majorly positive reviews and became a commercial success.