The HBO Harry Potter reboot’s first major casting choice might seem unusual, but what’s even more surprising is that it has already broken one of the biggest casting traditions from the original films. This unexpected move is sure to spark debate among longtime fans of the Wizarding World.

The role is Dumbledore, the most central figure to Harry Potter other than the trio of Harry, Ron and Hermione. But there's a bit of a problem.

Harry Potter star Jason Isaacs has revealed he knows some of the stars being cast in the new HBO series - and they’re “incredible actors”. Millions of fans worldwide are awaiting the new series, set to premiere in 2026, with casting news expected to arrive over the next few months.