In her long career, starting as a cabaret singer, chorus girl and movie actress in Berlin in the 1920s, Hollywood movie star in the 1930s, World War II entertainer at the front of war during the 1940s, and finally as an international theatre show performer from the 1950s to the 1970s, Dietrich became one of the most important movie icons of the 20th century. The American Film Institute ranked Dietrich No. 9 amongst the Greatest Female Stars of All Time.