Ian McDiarmid is a Scottish actor best known for playing Emperor Palpatine, also known as Darth Sidious, the Sith Lord who orchestrates the fall of the Galactic Republic and rise of the Empire across the entire Star Wars saga. McDiarmid remains the only actor to appear in all three Star Wars trilogies in the same role, portraying Palpatine’s public persona as a seemingly benevolent Senator and Chancellor in the prequel trilogy, the Emperor’s full villainous reveal in the original trilogy, and his shocking return in the sequel trilogy’s concluding chapter, The Rise of Skywalker.
His performance, blending calm political manipulation with theatrical menace once the character’s true nature is revealed, has made Palpatine one of cinema’s most enduring villains. Beyond Star Wars, McDiarmid has built a distinguished career in British theatre, including extensive work at the Almeida Theatre, which he co-ran as artistic director for a decade.
His unmatched, saga-spanning connection to the Star Wars franchise’s ultimate antagonist has made him one of the most significant and popular actors associated with the entire nine-film saga, and a hugely sought-after guest at conventions worldwide.
