Hollywood has a not-so-mysterious way of casting who they want for roles in films and television shows with major IPs. There is usually a breadcrumb trail that you can trace back to a few previous projects that will help you understand why a choice was made for a particular actor.

The Harry Potter show may be breaking a rule from the movies, but John Lithgow makes perfect sense to play Albus Dumbldore in the upcoming series.

The two-time Oscar nominee, who has played the likes of Winston Churchill and Roald Dahl before, could become the first confirmed named for the new show.