Hildegard Frieda Albertine Knef (December 28, 1925 - February 1, 2002) was a German actress, singer and writer. She was billed in some English language films as Hildegard(e) Neff. Arguably, her most influential roles included that of Susanne Wallner in Wolfgang Staudte's film Die Mörder sind unter uns (The Murderers Are Among Us) (the first film released after the Second World War in East Germany and produced by the Soviet filmmaking enterprise DEFA-Studio für Spielfilme) as well as her role as Marina in Die Sünderin (The Sinner) in which she performed the first nude scene in German filmmaking in 1950. The incident in the latter film sparked one of the largest scandals in German filmmaking history and drew the criticism of the Roman Catholic Church. She was the first and only German to have a successful Broadway show (Silk Stockings written by Cole Porter). She was sometimes compared to that other great German actress, Marlene Dietrich, in that they both were, or portrayed as, the liberated, self-confident woman. Hildegard Knef was one of the most important actresses of post-war Germany.