John Tiffany (born 1971) is a distinguished Scottish theatre director who served as Associate Director of the National Theatre of Scotland. He earned international recognition for directing "Black Watch" and the Broadway musical "Once," for which he won the Tony Award for Best Direction of a Musical. His other notable productions include "Let the Right One In" and "The Glass Menagerie."
Their most celebrated collaboration is "Harry Potter and the Cursed Child" (2016), written by Thorne from an original story by J.K. Rowling, Tiffany, and Thorne, and directed by Tiffany. The two-part stage play became a global theatrical phenomenon, breaking box-office records and winning numerous prestigious awards, including multiple Olivier Awards and Tony Awards, cementing both artists' reputations as leading figures in contemporary theatre.