James Earl Jones

James Earl Jones is the voice of Darth Vader in both the Original trilogy and the Prequel trilogy. He does not actually appear onscreen, as his voice was dubbed over while the suit was worn by David Prowse and Bob Anderson in the OT and Hayden Christensen in the PT.

Although it is believed so, it is debated whether he is also heard in the brief scene of Revenge of the Sith. Some claim that it is Hayden Christensen's voice distorted artificially.