Seth Holt (1923, Palestine – 14 February 1971, London) was a British film director, producer and editor. Holt was educated at Blackheath School in London. He trained originally as an actor, and spent a term at RADA in 1940 before acting in repertory in Liverpool and Devon. In 1942 he joined a documentary film company as assistant editor, and his career in films began. By the 1960s, Movie magazine championed Holt as one of the finest talents working in the British film industry, although his output was notably sparse.

Originally a film editor, he worked on a number of Ealing comedies before directing a number of features for Hammer Studios. The most enduring of the Hammer movies were the psycho-thrillers Taste of Fear (1961) and The Nanny (1965), with Bette Davis, and the gory Blood from the Mummy's Tomb (1971), which was completed by Michael Carreras after Holt's unexpected death from heart failure. His death is believed to be alcohol related. TCM's Ben Mankiewicz says it received better reviews than Hammer's other Mummy movies, which suffered from "The curse of the Mummy Movie," and he gave credit to Holt for the improvement. "He took the wrappings off."