In Norse mythology, Gunnar was a hero who had tried to rescue the ValkyrieBrünnehilde but failed. Sigurd then tried and succeeded, in the shape of Gunnar. After Sigurd married Brynhildr, he left her for Gunnar's sister, Gudrun.
... which he had performed onstage before taking it to Hollywood.
Academy Awards and Nominations
1945 - Nominated - Best Actor in a Supporting Role - Since You Went ...