Rosemary Theresa Theby (St. Louis, 8 april 1892 – Los Angeles, 10 november 1937) was een Amerikaans filmactrice. Tussen 1911 en 1940 speelde zij in ongeveer 250 films.
Gedeeltelijke filmografie The Wager (1911) The Mills of the Gods (1912) Baby (1915) The Lemon in Their Grove (1916) The Connecting Bath (1916) The Silent Mystery (1918) The Great Love (1918) The Rogue (1918) Bright and Early (1918) Heartsease (1919) The Mystery of 13 (1919) Married to Order (1920) The Butterfly Man (1920) A Connecticut Yankee in King Arthur's Court (1921) I Am the Law (1922) More to Be Pitied Than Scorned (1922) Yellow Men and Gold (1922) The Red Lily (1924) As Man Desires (1925) The Second Hundred Years (1927) The Port of Missing Girls (1928) The Fatal Glass of Beer (1933) Man on the Flying Trapeze (1935) One Million B.C. (1940)
Categorie:Amerikaans filmacteur