HBO's 'Harry Potter' TV show recasts all of the Hogwarts characters with new actors. See who's who in this cast guide.

If Harry Potter fans can suspend their disbelief to allow for invisibility cloaks, flying cars and time-traveling pocket watches, John Lithgow hopes they can get around his casting. Following the the 2x Oscar nominee’s casting as Albus Dumbledore,

In addition to Lithgow's casting as Dumbledore in the upcoming Max series from writer-showrunner Francesca Gardiner, the actor was also joined by Janet McTeer as Minerva McGonagall, Paapa Essiedu as Severus Snape, Nick Frost as Rubeus Hagrid, Luke Thallon as Quirinus Quirrell, and Paul Whitehouse as Argus Filch.