Ian McDiarmid (məkˈdɜːrmᵻd; born 11 August 1944) is a Scottish actor and director of stage and screen. Making his stage debut in Hamlet in 1972, McDiarmid joined the Royal Shakespeare Company in 1974, and has since starred in a number of Shakespeare's plays. He has received an Olivier Award for Best Actor for Insignificance (1982) and a Tony Award for Best Featured Actor in a Play for Faith Healer (2006).
He gained prominence for portraying Emperor Palpatine / Darth Sidious in the Star Wars multimedia franchise starting from Return of the Jedi (1983). He also acted in Gorky Park (1983), Dirty Rotten Scoundrels (1988), Restoration (1995), Sleepy Hollow (1999), and The Lost City of Z (2016).
McDiarmid was born in Carnoustie, Angus, Scotland, on 11 August 1944. He became a theatre aficionado when he was five years old, when his father took him to see an act named Tommy Morgan at a theatre in Dundee. In 2004, he stated, "It sort of fascinated me, and it also scared me. All those lights, all that make-up. I said to myself, 'I don't know what this is, but I want it.'"
However, fearing his father's disapproval, McDiarmid attended Queen's College, Dundee (now the University of Dundee, but then a constituent part of the University of St Andrews), where he received a Master of Arts in psychology. Soon after, he decided to pursue a career in the theatre instead, and took acting training courses at the Royal Scottish Academy of Music and Drama in Glasgow.
In 1968, McDiarmid received a gold medal for his work from the Royal Scottish Academy of Music and Drama, the first of many recognitions given to him for his work in the theatre. McDiarmid claimed he became its recipient "by doing all the boring jobs you have to do when you are young, to eke out an existence."
McDiarmid has worked as an actor and director in British theatre. He has starred in several Shakespeare plays, including Hamlet (1972), The Tempest (1974, 2000), Much Ado About Nothing (1976), Trevor Nunn's 1976 Macbeth (television 1978), The Merchant of Venice (1984), and King Lear (2005).