In 1715, she married Rene Magnon de Montaigu (1661–1737), the director of La troupe du Roi de Danemark, the French troupe that performed for the royal court, and the year after, she became a member of the trope and employed as court-actor.
[1] In 1721, the French troupe, which had performed for the royal court in Copenhagen since 1682, fired by the king, who wished to hire an Italian Opera-trope instead.
Rene Magnon and another French immigrant, Etienne Capion, then asked permission to open a Public theatre.
[2] Capion was the director, Magnon was responsible for the actors, and Marie Madeleine became the first actress to have performed for the Danish Public on an official theatre.
The female actors were few; among them were also Helene le Coffre, Maren Magdalene Lerche and Marie Madeleines own dotter Frederikke Sophie.