Alexandra Byrne is an Academy Award-winning costume designer.

Despite having costumed only eight films in her career, she has established herself as one of the greatest working costume designers in Hollywood, earning Academy Award nominations for four of her films — Elizabeth, the 2007 sequel Elizabeth: The Golden Age, Hamlet and Finding Neverland — and considerable acclaim for the other three — Persuasion, Captain Corelli's Mandolin and The Phantom of the Opera.