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David Prowse
David Charles Prowse (1 July 1935 – 28 November 2020) was an English actor, bodybuilder, strongman and weightlifter. He portrayed Darth Vader (voiced by American actor James Earl Jones) in the original Star Wars trilogy and a manservant in Stanley Kubrick's 1971 film A Clockwork Orange. In 2015, he starred in two documentaries concerning his Darth Vader role, one entitled The Force's Mouth which included Prowse voicing Darth Vader's lines with studio effects applied for the first time, and the other entitled I Am Your Father covering the subject of fallout between Prowse and Lucasfilm.
Prior to his role as Vader, Prowse had established himself as a super-hero figure in the United Kingdom as the Green Cross Man in the Green Cross Code road safety public information aimed at children and young people.
Source: Wikipedia