H2O is a 2002 Indian Kannada-Tamil bilingual film directed by debutants N. Lokanath and Rajaram. The film's script was written by Upendra, who stars in the lead role with Prabhu Deva and Priyanka Trivedi, along with Babu Mohan, Sadhu Kokila and Bank Janardhan portraying supporting roles. The film was dubbed in Tamil as H2O Kaveri and was produced by Dhanraj under Dhanraj Films.

The film's plot revolves around the fight between two villages, as the Kaveri water issue became controversial upon its release and did well at box office. The film's cinematography and editing were handled by H. C. Venugopal and T. Shashikumar respectively. The film was dubbed in Telugu under the same name, and it was dubbed into Hindi as Dil Ki Dhadkan. The core concept of using the dispute between two states as a metaphorical reference in the story went on to inspire a similar attempt in the 2016 Marathi movie Marathi Tigers.