Maro Charitra (1978)
Maro Charitra is a 1978 Telugu-language Indian romantic tragedy film written and directed by K. Balachander. It stars Kamal Haasan and Saritha in the lead with Madhavi and Sarath Babu appearing in prominent roles. The film deals with cross-cultural romance between a Tamil boy and a Telugu girl. Upon release, it became a "blockbuster" and remains a cult classic. Owing to its success in Andhra Pradesh, the film was released in the neighbouring states of Tamil Nadu and Karnataka without being dubbed into the respective languages. Balachander won a Best Director at the Southern Filmfare Awards in 1979. Later in 1981, Balachander remade the film in Hindi-language as Ek Duuje Ke Liye with Kamal Haasan reprising his role. Saritha, the female lead, was however replaced by Punjabi actress Rati Agnihotri. The Hindi remake became a success as well. Both the films were listed among CNN-IBN's 100 greatest Indian films of all time in 2013.
More at Wikipedia.