Leigh Douglass Brackett (December 7, 1915 – March 18, 1978) was a Hollywood writer and a noted science fiction and fantasy author who was a regular contributor to various science fiction pulps in the 1940's. She was also a mentor and collaborator of Ray Bradbury. She was married to fellow science fiction pulp writer Edmond Hamilton for 31 years (until his death in 1977).

In Hollywood, she wrote such films as The Long Goodbye, Hatari! and Rio Bravo. She also wrote the first draft of Star Wars: Episode V The Empire Strikes Back. Shortly after she completed the draft, she died after a battle with cancer.