A member of the repertory company presenting Orson Welles's Mercury Theatre radio programs, she played supporting roles in some 30 films during the 1940s and 1950s.

She was named for her uncle, George Backus, a light comedic actor who performed in Florenz Ziegfeld's original stage production of Way Down East.

[3] While living in New York, Backus worked in stock theatre and on the Broadway stage[4] and began to write plays and short stories.

[2] In 1930 CBS put Backus in charge of all of the network's dramatic presentations, to guide the development of the new art of the radio play.

[13] On September 19, 1951, Backus appeared under subpoena as an uncooperative witness before the House Un-American Activities Committee, which was investigating Communism in the motion picture industry.

[16]: 102 Georgia Backus Alexander died September 7, 1983, in Sun City, California, and was buried at Forest Lawn Memorial Park.