HBO declares the celebs filling out the Hogwarts workers roster in its upcoming ‘Harry Potter’ TV collection. The collection will function John Lithgow as Albus Dumbledore, 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.
