George R.R. Martin, who wrote the Song of Ice and Fire novels on which the megahit HBO series was based, is working with playwright Duncan MacMillan and director Dominic Cooke on a big, Harry Potter and the Cursed Child-type play that producers plan to open in New York, London, and Sydney and/or Melbourne. The draw is that the play will depict a major event in Westeros history that took place 16 years before the novels and Game of Thrones start. – The Hollywood Reporter