Clive Revill
From Wookieepedia, the Star Wars wiki.
Clive Revill (born April 18, 1930) was the original voice of Emperor Palpatine in The Empire Strikes Back. He was replaced by Ian McDiarmid in the Special Edition DVD.
Along with Phil Fondacaro, Felix Silla, Fionnula Flanagan and Jason Wingreen, Revill was involved in both a Star Wars film and an episode of Star Trek, having played Sir Guy of Gisbourne in the Star Trek: The Next Generation episode "QPid."
He is also exceptional for participating in a Star Wars game as well: he voices Jan Dodonna in the Star Wars: X-Wing Collector's edition.
