She began a partnership with Gwen Farrar (1899-1944) when they met during World War I, Blaney played the piano and Farrar played the cello. In 1927, she appeared in a short film made in the Phonofilm sound-on-film process, singing "How About Me?" and "He's Funny That Way".
In her later career, Blaney appeared in a number of films and television programmes between the times of 1956 to 1981, including Who Done It? (1956) and the soap opera Crossroads. Blaney died in 1983 at the age of 90.