Karen Margrete Maria (Lulu) Ziegler (18 April 1903 – 14 November 1973) was a Danish actress, singer and theatre director who was active in both Denmark and Sweden. She gained fame as a cabaret singer in the 1930s, enchanting her audiences in her own expressive style. In 1942, after attracting anti-German support at her cabaret in central Copenhagen, she was forced to flee to Sweden where she continued her highly popular anti-Nazi performances in revues. After the war, she returned to Denmark where she was welcomed as a heroine. When her popularity waned in the 1950s, she returned to Sweden, performing in the cabaret restaurant Hamburger Börs. There she directed shows with performances including Lars Forssell's increasingly popular chansons. She later devoted her skills to theatre management, directing shows in Gothenburg and Odense where she staged the musical Cabaret in 1968.[1][2][3]