“Harry Potter,” the beloved fantasy book series ... “Tumbleweeds” Oscar nominee Janet McTeer as Professor McGonagall and “Shaun of the Dead” comedian Nick Frost as Hagrid.

HBO’s Harry Potter reboot is starting to take shape ... Joining him are Janet McTeer as Minerva McGonagall, Paapa Essiedu as Severus Snape, and Nick Frost as Rubeus Hagrid.