Ray Douglas Bradbury (born August 22, 1920) is an American mainstream, fantasy, horror, science fiction, and mystery writer.

Best known for his dystopian novel Fahrenheit 451 and The Martian Chronicles, Bradbury is widely considered one of the greatest and most popular American writers of speculative fiction of the twentieth century.

Ray Bradbury's popularity has been increased by more than 20 television shows and films using his writings (see Adaptations of his work).