Unnidathil Ennai Koduthen is a 1998 Indian Tamil-language romantic drama film written and directed by Vikraman. The film stars Karthik and Roja, with Ajith Kumar in a guest appearance. Ramesh Khanna, Moulee, Sathyapriya, Fathima Babu, and Madhan Bob play other supporting roles. It was Karthik's 100th film.