Kenneth Colley
From Wookieepedia, the Star Wars wiki.
Kenneth Colley (December 7, 1937—) portrayed Admiral Firmus Piett in The Empire Strikes Back and Return of the Jedi. Colley is the only actor to play the same Imperial officer in more than one Star Wars film. Another notable role was that of Jesus in Monty Python's the Life of Brian.
In 1973, he had a role in Hitler: The Last Ten Days, which also starred Alec Guinness and Julian Glover; and in 1978, he was in a version of Les Misérables with Michael Sheard. He and Brian Blessed both appeared in the 1988 TV miniseries War and Remembrance. Colley also appeared in 1996's Brassed Off, which starred Ewan McGregor.

