Karin Hardt Meta Therese (28 April 1910 in Altona, Hamburg – 5 March 1992 in Berlin) was a German actress.

In 1931, she made with Vater geht auf Reisen her film debut and was promoted in the coming years, quickly becoming a popular star.

Among her best known films of the 1930s include Ein gewisser Herr Gran (1933), Barcarole (1935), The Roundabouts of Handsome Karl (1938) and Menschen vom Varieté (1939), where she was the naive blonde rival of La Jana.

After the war, only a few more film appearances followed such as the Queen in Fritz Genschow's fairytale Sleeping Beauty (1955), in addition to Horst Buchholz in Endstation Liebe (1957) and alongside Kirk Douglas in Town Without Pity (1961).

After appearances on TV shows like Bei uns zu Haus (1963), Der Forellenhof (1965), Die Unternehmungen des Herrn Hans (1976) and as a grandmother in Ein Jahr ohne Sonntag, and movies like Just a Gigolo (1979, directed by David Hemmings), she played from 1985 to 1986 the housekeeper Kati in the successful TV-series The Black Forest Clinic and in 1988 the mother of Robert Liebling in the ARD series Liebling Kreuzberg.