"Long Lost Christmas" was filmed in London, England. The city of London was chosen as the setting for the movie because it is known for its historic architecture, diverse cultures, and vibrant atmosphere. The film crew also took advantage of the city's many scenic locations, including Trafalgar Square, Tower Bridge, and the London Eye. The movie's plotline, which centers around a lost Christmas stocking, was also inspired by the holiday traditions and customs of London's residents.