Harry Potter revival trailer confirms earlier release date for HBO reboot series HBO's upcoming Harry Potter revival show was set to release in 2027, but fans of the Wizarding World won't have to wait that long. 26 March 2026 The Harry Potter revival will be released earlier than expected on HBO. Harry Potter reboot gets early release date The first trailer for the upcoming revival series based on JK Rowling's wizarding novels - which started with Harry Potter and the Philosopher's Stone has been unveiled, and fans won't be waiting until 2027 like they expected.