John Michael Frederick Castle (born 14 January 1940) is an English actor. He is best known for his film and television work, most notably playing Bill in Michelangelo Antonioni's Blowup (1966) and Geoffrey in The Lion in Winter (1968). Other significant credits include Man of La Mancha (1972), I, Claudius (1976) and RoboCop 3 (1993). He is also a noted voice actor and has recorded an audiobook version of Vanity Fair (novel).
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Early life
Born in Croydon, Castle was educated at Brighton College and Trinity College, Dublin, and trained at the Royal Academy of Dramatic Art (RADA).
Career
Castle's first appearance was as Westmoreland on stage in Henry V on 5 June 1964, at the Open Air Theatre, Regent's Park. He was 24 years old. His first Broadway theatre appearance was in February 1970 as "Jos" in the short-lived musical Georgy.
His screen debut was in Michelangelo Antonioni's 1966 film Blowup playing David Hemmings' artist friend, Bill. In 1968, he portrayed the plotting Prince Geoffrey in the film adaptation of The Lion in Winter, starring Peter O'Toole and Katharine Hepburn. According to Rotten Tomatoes, The Lion in Winter is Castle's "highest-rated" film. Also in 1967, he appeared in the British TV series The Prisoner as Number 12, a sympathetic guardian in the episode entitled "The General".
