Sir Alfred Joseph Hitchcock, KBE (13 August 1899 – 29 April 1980) was an English film director and producer. He pioneered many techniques in the suspense and psychological thriller genres. After a successful career in British cinema in both silent films and early talkies, Hitchcock moved to Hollywood. On 19 April 1955, he became an American citizen while remaining a British subject.

Over a career spanning more than half a century, Hitchcock fashioned for himself a distinctive and recognisable directorial style. He pioneered the use of a camera made to move in a way that mimics a person's gaze, forcing viewers to engage in a form of voyeurism. He framed shots to maximise anxiety, fear, or empathy, and used innovative film editing. His stories frequently feature fugitives on the run from the law alongside "icy blonde" female characters. Many of Hitchcock's films have twist endings and thrilling plots featuring depictions of violence, murder, and crime, although many of the mysteries function as decoys or "MacGuffins" meant only to serve thematic elements in the film and the extremely complex psychological examinations of the characters. Hitchcock's films also borrow many themes from psychoanalysis and feature strong sexual undertones. Through his cameo appearances in his own films, interviews, film trailers, and the television program Alfred Hitchcock Presents, he became a cultural icon. Hitchocks reputation as a filmmaker is offset by claims that he engaged in obsessive and controlling behaviour towards many of his leading ladies, and that in some cases this extended to physical abuse and sexual harrassment.