Title: Star Wars (film)
Content:  the voice of Darth Vader. Lucas originally intended for Orson Welles to voice the character after dismissing Prowse due to his West Country English accent (which led to him being nicknamed, within the cast, as "Darth Farmer"). However, determining that Welles' voice would be too familiar to audiences, Lucas instead cast then-relatively less recognizable Jones.  Other actors include Phil Brown and Shelagh Fraser as Luke's Uncle Owen and Aunt Beru; Jack Purvis, Kenny Baker's partner in his London comedy act, as the Chief Jawa in the film; and Eddie Byrne as Vanden Willard, a Rebel general. Denis Lawson and Garrick Hagon played rebel 
Title: Darth Vader
Content:   Darth Vader was portrayed by bodybuilder David Prowse in the original film trilogy, with fencer Bob Anderson performing the character's lightsaber fight scenes. At 6ft 6in tall, George Lucas thought Prowse "brought a physicality to Darth Vader that was essential for the character ... with an imposing stature and movement performance to match the intensity and undercurrent of Vader’s presence." Lucas chose to have a different actor be the voice of Vader, since Prowse had a strong West Country English accent that led the rest of the cast to nickname him "Darth Farmer". Lucas originally intended for Orson Welles to voice Vader, but after deciding that Welles's voice would be too recognizable, he cast the lesser-known James Earl Jones instead. Jones initially felt 
Title: Star Wars: Episode III – Revenge of the Sith (video game)
Content:  talent for the animated version of Count Dooku, voices various minor characters as well as Dooku himself. General Grievous is voiced by Matthew Wood, who also provided his voice in the game's film counterpart and the 2008 Clone Wars series. Terrence C. Carson voices Mace Windu and Nick Jameson voices Chancellor Palpatine/Darth Sidious and Ben Kenobi. Scott Lawrence, best known for his role as United States Naval JAG lawyer Cmdr. Sturgis Turner on the CBS series JAG provides the voice for Darth Vader. Yoda and Cin Drallig are both voiced by Tom Kane, who also provides additional voices. Finally, Serra Keto is voiced by Kari Wahlgren.
Title: Sam Witwer
Content:  A lifelong Star Wars fan, Witwer provided both his voice and likeness for lead character Galen Marek / Starkiller (Darth Vader's secret apprentice) in the 2008 video game Star Wars: The Force Unleashed and 2010 sequel Star Wars: The Force Unleashed II. He also voiced Darth Sidious (Emperor Palpatine) in the first game, and reprised it for the games Disney Infinity 3.0 and Battlefront and for the original season 2 premiere of Star Wars Rebels; however, in 2019, the role was re-dubbed by Ian McDiarmid who portrayed Palpatine in the films and in Rebels season 4. For Star Wars: The Clone Wars, Witwer had also vocally 
Title: Vader Episode I: Shards of the Past
Content: Dupree Jones as Darth Vader ; Jesse Gomez as the voice of Darth Vader ; Star Wars Theory (Neo) as unmasked Darth Vader ; Marik Knight as Young Anakin Skywalker ; Steven Bartlett as Emperor Palpatine ; Bradley Klein as the voice of Emperor Palpatine ; Catherine LaSalle as Padmé Amidala ; Andrew Branch as Commander Fox 
Title: David Prowse
Content:  Prowse played the physical form of Darth Vader in the original Star Wars trilogy. Prowse spoke the dialogue during filming, but George Lucas wanted a "darker voice" than Prowse's relatively jovial West Country accent, and had James Earl Jones provide a more sinister, malevolent voice for the character. Prowse stated he was originally told he would be seen and heard at the end of Return of the Jedi when Vader's mask was removed. Instead, actor Sebastian Shaw was used. Upon Prowse's death, Lucas stated that:"David brought a physicality to Darth Vader that was essential for the character. He made Vader leap off the page and on to the big screen, with an 
Title: Darth Vader
Content:  it. They trained extensively with stunt coordinator Nick Gillard to memorize and perform their duel together. As in the previous prequel film, McGregor and Christensen performed their own lightsaber fighting scenes without the use of stunt doubles. Anakin has also been voiced by Mat Lucas for the 2003 micro-series Clone Wars, and by Matt Lanter in the CGI animated film The Clone Wars, the television series of the same name and for Anakin's small roles in the animated series Rebels and Forces of Destiny. James Earl Jones reprised the voice role for Vader's appearances in Rebels. Both Lanter and Jones contributed their voices for the second-season finale of Rebels, at times with identical dialogue spoken by both actors blended together in different ways.
Title: List of Star Wars Rebels characters
Content:  Darth Vader (voiced by James Earl Jones and Ben Burtt as Darth Vader, Matt Lanter as Anakin Skywalker, archive audio of Hayden Christensen as Anakin Skywalker in the fourth season) is the Imperial army's cyborg Sith commander and a former Jedi corrupted by Emperor Palpatine. He first appears in his second chronological appearance in "Fire Across the Galaxy" where he appears before Grand Moff Tarkin and Agent Kallus sometime after the Grand Inquisitor's death. He later appears in the season 2 premiere movie "The Siege of Lothal", after Tarkin requests assistance against the Jedi presence in the rebels. Vader then wipes out most of the rebel cell in the Lothal system, injures half the Ghost crew, destroys Ezra's home and a community of displaced people on Lothal and has Minister Tua 
Title: Matt Sloan (voice actor)
Content:  As a voice actor, Sloan played Darth Vader in Soulcalibur IV. Sloan went on to reprise his role as the voice of Darth Vader in the LucasArts video games Star Wars: The Force Unleashed, and Star Wars: Empire at War: Forces of Corruption. He also appeared as the voice of Darth Vader during an episode of Deal or No Deal. Sloan also played Vader for the comedy short promoting TomTom devices. He returned as Vader for Star Wars: The Force Unleashed II. In 2012, Sloan voiced Darth Vader in both Lego Star Wars: The Empire Strikes Out and Kinect Star Wars. In 2015, Sloan returned to voice Vader in Disney Infinity 3.0, Star Wars Battlefront, Star Wars Battlefront II and multiple Lego Star Wars shorts and television series, as well as providing his voice for a sketch in the final episode of The Daily Show with Jon Stewart.
Title: David Prowse
Content:  David Charles Prowse (1 July 193528 November 2020) was an English bodybuilder, weightlifter and character actor in British film and television. 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 figure in the United Kingdom as the Green Cross Man in the Green Cross Code road safety public information aimed at children.

Question: who voiced darth vader in the original star wars movies?
Answer: James Earl Jones.