Standing in a shadowy archway on a bridge leading into Broughton Castle in Oxfordshire, England, sheep nibbling the grass below, Julianne Moore curtsied deeply, lowering her eyes before a splendidly gowned woman. “Your Majesty,” she began, before being drowned out by a loud “baa” from the sheep. Moore burst out laughing, as did her fellow actress, Trine Dyrholm, who was playing Queen Anne of England.