Ian McDiarmid is known for his roles as The Emperor in the movies "Star Wars: Episode V – The Empire Strikes Back (1980)" and "Star Wars: Episode VI – Return of the Jedi (1983)", as Senator Palpatine (a.k.a. Darth Sidious) in "Star Wars: Episode I – The Phantom Menace (1999)", and as Chancellor Palpatine (a.k.a. Darth Sidious) in "Star Wars: Episode II – Attack of the Clones (2002)" and "Star Wars: Episode III – Revenge of the Sith (2005)".

Some other movies he appeared in are "The Likely Lads (1976)", "A Performance of Macbeth (1979)", "The Awakening (1980)", "Richard's Things (1980)", "Sir Henry at Rawlinson End (1980)", "Dragonslayer (1981)", "Gorky Park (1983)", "Dirty Rotten Scoundrels (1988)", "Chernobyl: The Final Warning (1991)", "Heart of Darkness (1993)", "Selected Exits (1993)", "Restoration (1995)", "Hillsborough (1996)", "Great Expectations (1999)", "All the King's Men (1999)", "Sleepy Hollow (1999)", "Crime and Punishment (2002)", "Our Hidden Lives (2005)", "Margaret (2009)" and "The Lost City of Z (2016)".

He appeared on TV shows like "Red Letter Day", "The Professionals", "The Nation's Health","Summer Season", "Inspector Morse", "The Young Indiana Jones Chronicles", "Karaoke", "Cold Lazarus", "Rebecca", "Touching Evil", "An Unsuitable Job for a Woman", "The Last King", "MI-5", "Elizabeth I", "City of Vice", "37 Days" and "Utopia".

Happy Birthday!