The mezzo-soprano Margit Diefenthal studied with Claudia Rüggeberg at the Folkwang-Hochschule in Essen, completing her studies with distinction. At the same time she participated in master-courses with Judith Beckmann, Norman Shetler, Christa Ludwig and Axel Bauni. From 2000 to 2004 she was a member of the Meiningen State Theatre ensemble, where her roles incluced those of Oktavian, Dorabella, Cherubino, and Orlovsky, as well as Second Norne, Sigrune and Flossilde in The Ring. She has made guest appearances at the opera houses in Stuttgart, Heidelberg, Bremerhaven, Wiesbaden, Mannheim and Weimar. In July 2000 she made her début at the Proms in London with the BBC Symphony Orchestra and in the following year at the Esterháza Haydn Festival. She has collaborated with distinguished conductors, including James Levine, Hans Wallat, György Györivanyi Ráth and Donald Runnicles. She also makes regular appearances in oratorio and in Lieder recitals. Her broadcasts and television appearances are further evidence of her achievement.