Kari-Jukka Hietalahti (born 13 September 1964) is a Finnish actor and screenwriter.
Kari Hietalahti is best known for having appeared in several popular Finnish television series, such as Vintiöt, Ihmisten puolue, Ihmebantu and Roba, and in films such as Rööperi, Vares- Private eye and Aikuisten poika. In August 2011, Hietalahti's first book Kenraali Pancho & Pojat – Suuri kalottikirja was published.
Hietalahti´s wife is costume designer Minni Härkönen and they have one son.