A professional pianist during her childhood, she practiced studying opera as a career in her adult years, performing in theatres across multiple states.

Born in Linn Creek, Missouri to Mr. and Mrs. Joseph H. Moulder,[1] Morgan was performing piano by the age of 15 in professional orchestras in Montana and Oklahoma.

Soon after, Behymer was contacted by Twentieth Century Fox looking for an actress who could sing opera, which resulted in him recommending Morgan for the role.

[2] During her scene in the film, she performed the sextet Chi mi frena in tal momento from Donizetti's Lucia di Lammermoor.

[7] In the 1948 theatre production of Black John as Goldie, the Hollywood Citizen-News said Morgan "roars lustily through her role as the pursuing wife", though had more "vigor than accuracy" when it came to replicating a New England accent.