Warner Bros. will open the United Kingdom’s largest official Harry Potter store on London’s Oxford Street in November 2026, ahead of HBO’s new series premiere on December 25, 2026. The flagship will span two floors and more than 21,000 square feet, making it a major holiday destination for Wizarding World fans. Designed with Diagon Alley as its creative blueprint, the store will feature a dragon looming over a Gringotts inspired display, a full size Knight Bus and a Leaky Cauldron location serving food and foaming Butterbeer. Translation: this is less of a quick merch stop and more of a highly Instagrammable pilgrimage. What Will Fans Find Inside? The Oxford Street location will be only the second official Harry Potter shop in the U.K., following the store at King’s Cross Station. Warner Bros. says the new site will carry exclusive items, including a Diagon Alley wand, a limited Funko Pop figure and MinaLima artwork based on the Knight Bus and the magical shopping district. Karl Durrant, Warner Bros.’ senior vice president of worldwide retail, called the opening a “truly special milestone” and said Oxford Street was an ideal setting for celebrating the franchise’s global fan base. The timing also puts the store in prime position for the HBO series launch, while a separate unofficial Potter themed shop in central London reportedly closed shortly before Warner Bros. announced its new flagship.