HBO's "Harry Potter" television series has started production and added several more actors to its cast, the network revealed on Monday, July 14. The new cast members include: Rory Wilmot as Neville Longbottom;

The first look at the Shaun of the Dead actor as Rubeus Hagrid in the upcoming HBO series has been revealed, and he's almost unrecognizable in the photo of him as the lovable half-giant.

Several high-profile actors have been announced in other key roles, including Paapa Essiedu as Severus Snape, John Lithgow as Albus Dumbledore and Katherine Parkinson as Molly Weasley.