As Ahmad in The Thief of Bagdad (1940)
24 November 1917|
|Died||29 November 2002
Petersfield, Hampshire, England
|Other names||John Justinian de Ledesma|
|Spouse(s)||Pola Nirenska (1935–1949) (divorced)
Barbara Murray (1952–1964) (divorced) 3 children
Alison McMurdo (1979–2002) (his death)
John Justin (24 November 1917 – 29 November 2002) was a British stage and film actor. 
John Justinian de Ledesma was born in London, England, the son of a well-off Argentine rancher. Though he grew up on his father's ranch, he was educated at Bryanston School, Dorset. He developed an interest in flying and became a qualified pilot at the age of 12, though he was not allowed to fly solo at the time because of his age.
The acting bug bit him early. By the age of 16, he had joined the Plymouth Repertory. In 1937, he briefly trained with the Royal Academy of Dramatic Art, but did not like it and soon joined the repertory company of John Gielgud. In 1938, he auditioned for and won the role for which he is perhaps best remembered, Ahmad in the 1940 version of The Thief of Bagdad, opposite Sabu.
World War II broke out during the film's production. After completing the picture, Justin joined the Royal Air Force, serving as a test pilot and flying instructor. He also worked on two films, The Gentle Sex (1943) with Leslie Howard, and Journey Together (1944) with Edward G. Robinson.
With the war's end, Justin returned to acting. He made more films, such as David Lean's The Sound Barrier (1952), Island in the Sun (1957) and Lisztomania (1975), but his strong preference was for the stage. He became a member of the Old Vic company in 1959. He made his Broadway debut in 1960 in the play Little Moon of Alban. In 1979 he played the ghoulish lover in the BBC's dramatisation of Le Fanu's Strange Incident in the Life of Schalcken the Painter, one of its Christmas ghost stories.
Justin was married three times, first to dancer and choreographer Pola Nirenska. His second marriage, to actress Barbara Murray, lasted from 1952 to 1964; they had three daughters. From 1970 to his death in 2002, he was married to Alison McMurdo.
- The Thief of Bagdad (1940)
- The Gentle Sex (1943)
- Call of the Blood (1949)
- The Sound Barrier (1952)
- King of the Khyber Rifles (1953)
- The Village (1953)
- The Teckman Mystery (1954)
- The Man Who Loved Redheads (1955)
- Safari (1955)
- Island in the Sun (1957)
- The Spider's Web (1960)
- Savage Messiah (1972)
- Lisztomania (1975)
- Valentino (1977)
- The Big Sleep (1978)
- Trenchcoat (1983)