Ray Douglas Bradbury (August 22, 1920 – June 5, 2012) was an American author and screenwriter. One of the most celebrated 20th-century American writers, he worked in a variety of modes, including fantasy, science fiction, horror, mystery, and realistic fiction.

Bradbury was mainly known for his novel Fahrenheit 451 (1953) and his short-story collections The Martian Chronicles (1950) and The Illustrated Man (1951). Most of his best known work is speculative fiction, but he also worked in other genres, such as the coming of age novel Dandelion Wine (1957) and the fictionalized memoir Green Shadows, White Whale (1992). He also wrote and consulted on screenplays and television scripts, including Moby Dick and It Came from Outer Space. Many of his works were adapted into television and film productions as well as comic books.

The New York Times called Bradbury "the writer most responsible for bringing modern science fiction into the literary mainstream."