Morgan was born in Warmley, Gloucestershire to Welsh parents on December 6, 1880,[2] and within a year crossed the Atlantic to be raised in Boston, Massachusetts.

Upon her graduation from the New England Conservatory of Music, she began performing with the Boston Opera Company as a singer and violin player earning $25 per week.

Her father, Roderick "Rod" Morgan, worked as a blacksmith in Anaconda while her older brother, Charles, supported his family as a machinist.

[4] On Sunday, February 17, 1901, she married Leo Cullen Bryant, a 23-year-old native of Albion, Wisconsin,[5] who taught music and headed The Margaret Theatre Orchestra in Anaconda.

[9] By the 1910s and probably earlier, Morgan was touring in dramas and musical comedies such as The Master Mind (1914, with Carl Rickert),[10] The Silent Voice (1914, with Otis Skinner),[11] Her Temporary Husband (1926),[12] She Couldn't Say No (1930, with Charlotte Greenwood),[13] and Tattle Tales (1933, with Barbara Stanwyck).