Harihar Gundurao Dattatreya (born 1942), popularly known as Dattanna, is an Indian actor who has appeared in more than 204 films and several plays.

[1] Dattatreya was born in 1942 in Chitradurga, in the erstwhile Kingdom of Mysore (now in Karnataka, India) to Harihar Gundurao and Venkamma.

In 1978, he obtained a master's degree in electrical communication engineering from Indian Institute of Science (IISc), Bengaluru.

[6] Dattatreya began acting in plays in the late 1950s and early 1960s, and while studying engineering in college at UVCE.

[10] In the 2012 released film Bharath Stores, his role as Govinda Shetty, a Grocery shop owner hit hard when the Union Government increases foreign direct investment in the retail sector, won widespread critical acclaim.