
Unnodu Oru Naal is a 2013 Indian Tamil-language romantic thriller film directed by Durai Karthikeyan and starring Arjun Vijayraghavan, Gibran, and Neelam.
The film follows two best friends, Karthik and Madhav, who both fall in love with the same girl, Priya. After Priya leaves Madhav for Karthik, Madhav tries to forget her and leaves the country. However, Karthik marries Priya, but later reveals a different side of himself.
The film is inspired by the American film Across the Hall (2009) and has a similar storyline with Ner Ethir (2014). The music for the film was composed by Sivaprakasam, with lyrics by G. Malathi and Rudra.
Arjun Vijayraghavan plays Karthik, Gibran Osman plays Madhav, and Neelam plays Priya. Due to director Durai Karthikeyan's death during production, his assistant Shakthi took over the direction of the film.