Her film debut for Zukor's Famous Players studio was the starring role in the now lost feature film "The Morals of Marcus" in 1915 based on the 1907 Broadway play she had starred in. The following year she played the lead in the 1916 film version of Charles Dickens' "Oliver Twist", a role she previously played with much acclaim on stage in 1912. Throughout the 1910s, Doro remained a highly respected and popular leading lady. Most of her earliest screen appearances are now lost. One of the few to survive is "Lost and Won" from 1917.