King Charles is set to star in a brand new documentary on Prime Video in 2026, which depicts the King’s lifelong commitment to the philosophy of ‘Harmony’ and the planet. It follows after Prince William received praise for his own TV feature after he joined Eugene Levy for a special episode of his Apple TV documentary The Reluctant Traveller . King Charles has revealed his ‘fondest hope’ is that the new documentary will inspire people to protect our planet and create a more sustainable future.