who was the voice of darth vader in episode iii?
Hayden Christensen
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 James Earl Jones provides the voice of Darth Vader 

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 David Shaughnessy as the voice of Sir Didymus , a brave fox knight . 

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 A radio drama adaptation of the film was written by Brian Daley with additional material contributed by John Whitman and was produced for and broadcast on National Public Radio in 1996 . It was based on characters and situations created by George Lucas and on the screenplay by Lawrence Kasdan and George Lucas . The first two Star Wars films were similarly adapted for National Public Radio in the early 1980s , but it was not until 1996 that a radio version of Return of the Jedi was heard . Anthony Daniels returned as C @-@ 3PO , but Mark Hamill and Billy Dee Williams did not reprise their roles as they had for the first two radio dramas . They were replaced by newcomer Joshua Fardon as Luke Skywalker and character actor Arye Gross as Lando Calrissian . John Lithgow voiced Yoda , whose voice actor in the films has always been Frank Oz . Bernard Behrens returned as Obi @-@ Wan Kenobi and Brock Peters reprised his role as Darth Vader . Veteran character actor Ed Begley , Jr. played Boba Fett . Edward Asner also guest @-@ starred speaking only in grunts as the voice of Jabba the Hutt . The radio drama had a running time of three hours . 

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 Shaw was particularly known for his performances in productions of Shakespeare plays which were considered daring and ahead of their time . In 1966 , he joined the Royal Shakespeare Company , where he remained for a decade and delivered some of his most acclaimed performances . He also wrote several poems and a novel , The Christening , in 1975 . He is also known for his brief but important performance in Return of the Jedi , the original third installment in the Star Wars franchise , in which he portrayed an unmasked Darth Vader and Anakin Skywalker 's ghost in the original version of the film . 

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 Bill Wallis , who played Mr. Prosser and Prostetnic Vogon Jeltz in the original series , was unavailable , and Toby Longworth took the role of Jeltz in the new series . John Marsh , who had been the continuity announcer for Fits Two to Twelve , was rehired to reprise this role . There was also a posthumous cameo role by Adams as Agrajag , edited from his BBC audiobook recording of the novel . 
