The Duchess of Edinburgh brought the glitz and glamour to the premiere of King Charles's passion project film at Windsor Castle last night. Sophie, 61, repurposed a striking, emerald green Galvan gown that she first wore for another film premiere in London six years ago. While the Princess of Wales was not in attendance, Sophie easily charmed the King's A-list guests arriving for Windsor Castle's maiden film premiere. Ahead of the premiere, a spokesperson for Buckingham Palace said Finding Harmony is unlike any other royal documentary. After its glitzy premiere, the film - produced by Amazon - will be released on Prime Video in over 240 countries across the world on February 6.