HBO's new Harry Potter series is set to cast Nick Frost as Hagrid, with John Lithgow as Dumbledore, for a 2026 debut.

HBO's upcoming Harry Potter series is reportedly finalizing a deal with Nick Frost to play Rubeus Hagrid. This new adaptation aims to bring fresh portrayals to well-known characters, with John Lithgow confirmed as Dumbledore. The series, set decades before Harry Potter’s time at Hogwarts, will explore the wizarding world’s past and is expected to release in 2026.