His Dark Materials will be back for a third series. The commission will be based on The Amber Spyglass, the third part of Philip Pullman’s original trilogy of novels, and will star Dafne Keene as Lyra, Amir Wilson as Will, Ruth Wilson as Mrs Coulter, Simone Kirby as Mary Malone, Ruta Gedmintas as Serafina Pekkala, Jade Anouka as Ruta Skadi and James McAvoy as Lord Asriel.