Sidney Gilliat (15 February 1908 – 31 May 1994) was a British film director, producer and writer. He was the son of George Gilliat, Editor of the Evening Standard, born in the district of Edgeley in Stockport, Cheshire. In the 1930s Sidney Gilliat worked as a scriptwriter, most notably with Frank Launder on The Lady Vanishes (1938) for Alfred Hitchcock, and its sequel Night Train to Munich (1940), directed by Carol Reed. He and Launder made their directorial debut co-directing the home front drama Millions Like Us (1943). From 1945 he also worked as a producer, starting with The Rake’s Progress, which he also wrote and directed. He and Launder made over 40 films together, founding their own production company Individual Pictures. While Launder concentrated on directing their comedies, most famously the four St Trinian’s School films, Gilliat showed a preference for comedy-thrillers and dramas, including Green for Danger (1946), London Belongs to Me (1948) and State Secret (1950). He wrote the libretto for Malcolm Williamson’s opera Our Man in Havana, based on the novel by Graham Greene. He had also worked on the film. He married Beryl Brewer in the early 1930s. He had two children: Joanna Gilliat and the late Caroline Gilliat and three grandchildren Amanda Eliasch née Brown, Toby Brown and the late Camilla Horn née Russell. He died in Wiltshire, England in May 1994 aged 86.