Kari Diesen (née Heide-Steen; 24 June 1914 – 18 March 1987) was a Norwegian singer and revue actress. She worked for the revue theatre Chat Noir from 1937 to 1953, and for the Edderkoppen Theatre from 1954 to 1959. She participated in 24 films between 1941 and 1985. Among her best known song recordings is her version of "Hovedøen".