William Haggar (10 March 1851 – 4 February 1925) was a British pioneer of the cinema industry. Beginning his career as a travelling entertainer, Haggar, whose large family formed his theatre company, later bought a Bioscope show and earned his money in the fairgrounds of south Wales. In 1902 he began making his own short fictional films, making him one of the earliest directors in Britain. His films were shown world wide and his short Desperate Poaching Affray is believed to have influenced early narrative drama in American film, especially in chase genre. As a director Haggar is recognised for his use of editing and the depth of staging in his melodramas and crime films.