Giles Lytton Strachey (1 March 1880 – 21 January 1932) was a British writer and critic. A founder member of the Bloomsbury Group and author of Eminent Victorians, he is best known for establishing a new form of biography in which psychological insight and sympathy are combined with irreverence and wit. His 1921 biography Queen Victoria was awarded the James Tait Black Memorial Prize.
Though Strachey spoke openly about his homosexuality with his Bloomsbury friends (he had a relationship with John Maynard Keynes, who also was part of the Bloomsbury group), it was not widely publicised until the late 1960s, in a biography by Michael Holroyd. He had an unusual relationship with the painter Dora Carrington. She loved him and they lived together from 1917 until his death. In 1921 Carrington agreed to marry Ralph Partridge, not for love but to secure the three-way relationship. She committed suicide two months after Strachey's death. Strachey himself had been much more interested sexually in Partridge, as well as in various other young men. Strachey's letters, edited by Paul Levy, were published in 2005.