Morton was the original voice of the artificially intelligent operating system in the 2013 romantic science fiction drama "Her" directed by Spike Jonze, but in post-production, she was replaced by Scarlett Johansson. She is, however, credited as an associate producer. Morton starred in the independent drama "Decoding Annie Parker" (2013) opposite Helen Hunt, playing a woman with breast cancer. The film was released in limited theaters, to mixed reviews from critics. Nevertheless, Betsey Sharkey of "Los Angeles Times" observed that the actress "gives Parker such a humility within a warm humanity that you feel an obligation to stick with her through the mounting horrors". She was awarded the Best Actress Golden Space Needle Award at the 2013 Seattle International Film Festival.