The magic is back - and the Sorting Hat has spoken! HBO officially reveals the first cast members for its highly anticipated Harry Potter reboot series - and the choices are sparking BIG reactions! Here's who's headed to Hogwarts: John Lithgow as the wise and powerful Albus Dumbledore Paapa Essiedu as the dark and layered Severus Snape Janet McTeer brings elegance and strength as Minerva McGonagall Nick Frost steps into the boots of beloved Rubeus Hagrid Plus: Luke Thallon as Quirrell,