The series is based on the book series of the same name by J. K. Rowling. It stars Dominic McLaughlin as Harry Potter, with Alastair Stout as Ron Weasley and Arabella Stanton as Hermione Granger. John Lithgow, Janet McTeer, Paapa Essiedu, and Nick Frost have supporting roles. The series will premiere on HBO in early 2027, with an eight-episode first season.