Under Capricorn is a 1949 British historical thriller film directed by Alfred Hitchcock about a couple in Australia who started out as lady and stable boy in Ireland, and who are now bound together by a horrible secret. The film is based on the play by John Colton and Margaret Linden, which in turn is based on the novel "Under Capricorn" (1937) by Helen Simpson. The screenplay was written by James Bridie from an adaptation by Hume Cronyn. This was Hitchcock's second film in Technicolor, and like his preceding color film "Rope" (1948), it features 9- and 10-minute long takes.