Prince Louis has warmed the hearts of royal fans in a throwback clip showing his adorable reaction to a letter from Santa. Those who watched the video – which has been reposted to TikTok a year after it was first filmed – now believe they have 'worked out' what Prince William and Kate Middleton 's youngest child said as the note was read to him during last year's royal carol service. As actor Jim Broadbent presented the letter and began to read, Louis – now six – raised his head and his eyes