Harry Potter and the Cursed Child is a play written by Jack Thorne, J. K. Rowling, and John Tiffany in two parts. When asked in an interview, J. K. Rowling is said to have claimed that Harry Potter and the Cursed Child was split into two parts because it is way too epic to be fit into only one play. It had a lot of details that could only be done justice by splitting it into two parts. Therefore, Harry Potter and the Cursed Child is a play written in two parts with each part having two acts.