Wing Commander Harihar Gundurao Dattatreya (Retd.) (born 1942), 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 a commissioned officer 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).
