Hans Adalbert Schlettow (11 June 1888 – 30 April 1945) was a German film actor. Schlettow appeared in around a hundred and sixty films during his career, the majority during the silent era. Among his best-known film roles was Hagen von Tronje in Fritz Lang's film classic Die Nibelungen (1924). In 1929 he starred in the British director Anthony Asquith's film A Cottage on Dartmoor. He was a member of the Militant League for German Culture and the National Socialist Factory Cell Organization. Schlettow died in the Battle of Berlin.