HBO’s “ Harry Potter ” TV series is filling out Hogwarts’ staff and students.

“Harry Potter” alum Warwick Davis , who played Charms Professor Filius Flitwick across all eight original films, is reprising the role for the HBO series. While Davis was double-billed in the Potter films as both Flitwick and Griphook, he’ll only play the former this time around. The goblin banker will instead be played by Leigh Gill.

Joining the Hogwarts staff alongside Davis are Sirine Saba as Herbology Professor Pomona Sprout, Richard Durden as the ghostly Professor Cuthbert Binns and Bríd Brennan as Madam Poppy Pomfrey.

As for the students, Elijah Oshin joins the cast as half-blood Dean Thomas, while Finn Stephens and William Nash join as Draco Malfoy’s cronies, Vincent Crabbe and Gregory Goyle, respec

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