Harry Potter' Series sets John Lithgow, Janet McTeer, Paapa Essiedu and Nick Frost as series regulars. Luke Thallon &  Paul Whitehouse will recur.

HBO announced its first selected cast members for the series in a press release on Monday. According to HBO, the "Harry Potter" TV series has cast six-time Emmy and two-time Tony Award winner John Lithgow as Albus Dumbledore.

On Monday, the network announced that John Lithgow, Janet McTeer, Paapa Essiedu, and Nick Frost will join the main cast as Albus Dumbledore, Minerva McGonagall, Severus Snape, and Rubeus Hagrid, respectively. HBO also confirmed two guest roles: Luke Thallon as Quirinus Quirrell and Paul Whitehouse as Argus Filch.