Harihar Gundurao Dattatreya, popularly known as Dattanna, is an Indian actor who has appeared in more than 204 films and several plays. Alongside his career as an actor, he served in the Indian Air Force as an Aeronautical Engineer for over 20 years and also occupied academic positions with Hindustan Aeronautics Limited (HAL). He is best known for his work in Kannada cinema, in which he appears in mostly supporting roles. In a film career of almost three decades, he has won two National Film Award – Special Jury Awards, one National Film Award for Best Supporting Actor and two Karnataka State Film Awards. He is known for his performances in Munnudi (2000), Bettada Jeeva (2011) and Bharath Stores (2012). In 2022, he was awarded the Rajyotsava Prashasti by the Government of Karnataka.

The National Film Award for Best Supporting Actor, officially known as the Rajat Kamal Award for the Best Supporting Actor, is an honour presented annually at India's National Film Awards ceremony by the Directorate of Film Festivals (DFF), an organisation set up by the Indian Ministry of Information and Broadcasting. A national panel appointed annually by the DFF selects the actor who has given the best performance in a supporting role within Indian cinema. The award is presented by the President of India at a ceremony held in New Delhi.