Harry Potter is an upcoming fantasy television series developed for HBO. The series is based on the series of fantasy books of the same name by English author J. K. Rowling. Produced by HBO Entertainment, Warner Bros. Television, Brontë Film & TV, and Heyday Films, the series stars Dominic McLaughlin as Harry Potter, with Alastair Stout as Ron Weasley and Arabella Stanton as Hermione Granger. Also starring John Lithgow as Albus Dumbledore, Janet McTeer as Minerva McGonagall, Paapa Essiedu as Severus Snape and Nick Frost as Rubeus Hagrid. Development on a Harry Potter series was revealed to have begun by January 2021, with a plan for a series spanning a decade as part of a faithful adaptation of the books. Creatively led by showrunner Francesca Gardiner and director Mark Mylod, casting for major roles began in November 2024, and confirmation came by April 2025. A casting call for the main roles of Harry, Ron, and Hermione was issued in September 2024; after considering 32,000 actors, McLaughlin, Stout, and Stanton were revealed to have been cast in May 2025. Principal photography began that July at Leavesden Studios in Hertfordshire, England. Originally set for a HBO Max release, the series shifted to an HBO release by June 2024. Harry Potter is scheduled to premiere on HBO in the United States in early 2027, with the first season consisting of eight episodes.