Brunette American leading lead with slender, petite figure and expressive mournful eyes. She played alluring types such as the harem girl Kut-al-Kulub in Kismet (1920) and scheming Queen Morgan Le Fey in A Connecticut Yankee in King Arthur's Court (1921).
Featured in many slapstick comedy shorts for Charley Chase and Mack Sennett, while appearing opposite film's top comedians at the time such as Andy Clyde, Oliver Hardy and W.C. Fields.
Harry and Rosemary's most successful film together was A Connecticut Yankee in King Arthur's Court (1921) in which Harry played the title role opposite Rosemary's Morgan Le Fey.
Her first big film hit was in Shakespeare's much shortened version of As You Like It (1912) playing the starring role of Cecila.
She and her actor/director husband Harry Myers suffered severe financial setbacks during the Depression and took on many minor, often unbilled roles after the age of sound thanks to the generosity of such friends as Oliver Hardy.