Yanamadala Kasi Viswanath is an Indian actor and film director who works in Telugu cinema. He worked as an assistant director, associate director and co-director for over 25 films. He debuted as a director with the romantic comedy film Nuvvu Leka Nenu Lenu (2002) which became a blockbuster at the box office. Then, he directed Toli Choopulone (2003) which was Nandamuri Kalyan Ram's debut film. Later, he turned an actor with the film Nachavule (2008) which became his breakthrough role. Since then, he has acted in more than 90 films.

Nachavule is a 2008 Telugu film directed by Ravi Babu and produced by Ramoji Rao. The film was the debut for the stars Tanish and Maadhavi Latha. The film is a teenage romantic comedy. It was released on 19 December, 2008. The film won three Nandi Awards.