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.

Harry Potter’s HBO reboot has reportedly found its Dumbledore, and the casting choice is nothing short of magical. Acclaimed actor John Lithgow is said to be in final talks to t