After auditioning 30,000 young actors, 11-year-old McLaughlin from Scotland will play Harry, 11-year-old Stanton will portray Hermione, and 12-year-old Stout from the north of England will play Ron.
JK Rowling, who will serve as an executive producer on the series, expressed her satisfaction with the casting choices, stating, "All three are wonderful. I couldn’t be happier."
Other cast members include Paapa Essiedu as Severus Snape, John Lithgow as Albus Dumbledore, Janet McTeer as Minerva McGonagall, Luke Thallon as Quirinus Quirrell, and Paul Whitehouse as Argus Filch.
The series is expected to run for a decade, with each season adapting one of Rowling's seven books, aiming for a faithful adaptation, despite Rowling's controversial views on trans rights causing friction with some fans and the original film stars.