Julie Montagu, Countess of Sandwich, styled as Viscountess Hinchingbrooke from 2004 to 2025, is an American entrepreneur, yoga instructor, blogger, writer and television personality. She is married to Luke Montagu, 12th Earl of Sandwich. Montagu began her television career as a cast member on the British reality series Ladies of London before hosting her own series on the Smithsonian Channel called An American Aristocrat's Guide to Great Estates. Since 2021 she has run her own series, American Countess, on YouTube.