Thoonga Nagaram (transl. Sleepless city) is a 2011 Indian Tamil-language action thriller film written and directed by debutant Gaurav Narayanan, starring himself along with Vimal, Bharani, Nishanth, and Anjali. The film, produced by Dhayanidhi Alagiri's Cloud Nine Movies, was shot entirely in Madurai, the city where the story takes place and which the title refers to. It was released on 4 February 2011 to relatively positive reviews and excellent box office collection. The film was dubbed in Telugu under the title Naluguru Snehithula Katha.