Aurora (Disney) welcomed Costa by asking her to perform a bird call, which she did successfully. However, being from Knoxville, Tennessee, Costa's strong southern accent nearly prevented her from being cast until she proved that she could sustain a fake British accent for the entire film. The filmmakers likened the situation to English actress Vivien Leigh successfully feigning a southern accent for her role as Scarlet O'Hara in the film "Gone With the Wind" (1939). Within hours of her audition, Walt Disney himself contacted Costa via telephone to offer her the job, which she immediately accepted. Aurora became Costa's first major film
Doris Davenport now classic "Gone with the Wind", she did well enough to become one of the finalists for the role, but lost out to actress Vivien Leigh. Despite not winning that major role, Davenport impressed MGM executive Samuel Goldwyn. In 1940, he gave a lead role to Davenport in the film "The Westerner", starring opposite Gary Cooper and Walter Brennan. That same year, she starred in the film "Behind the News" opposite Lloyd Nolan. It was her last role. With no other offers following that film, she soon retired from acting. She eventually settled in Santa Cruz, California, where she lived