From the 1930s to the 1950s, she played leading operetta roles in various Copenhagen theatres, frequently performing with Hans Kurt Jensen.
In addition to her many film roles, Hansen is remembered for playing Oda Holm in the popular Danish television series Matador (1978–81).
[2] In 1927, Hansen made a sensational debut at Fenix Teatret in Frederiksberg performing in the operetta No, No, Naneete.
From 1938, together with Hans Kurt at Nørrebros Theater, she became Denmark's leading operetta actress performing in a considerable number of popular attractions including Balalaika, Me and My Girl and The Gypsy Baron.
Together with Hans Kurt, she performed in The Merry Widow about a thousand times at Det Nye Teater where she become known for her delivery of the Vilja Song.