Dagmar Koller

Dagmar "Dagi" Koller, also known as Dagmar Zilk-Koller, (* August 26, 1939 in Klagenfurt, Carinthia) is an Austrian singer (soprano), dancer, actress, and television presenter. As a performer of musicals and operettas, she shaped the repertoire of the Volksoper Vienna for decades. From 1978 until his death in 2008, she was married to the later Mayor of Vienna, Helmut Zilk, and remained a prominent representative of Viennese cultural and social life outside the stage.

(From the German Wikipedia, translated. Text under CC BY-SA license.)