Los Angeles, Jan. 3 -- Production is currently underway for HBO's much-awaited 'Harry Potter' series, with fans eagerly anticipating the return of the wizarding world of Hogwarts.

While a fresh cast has been assembled for the TV show, actor Warwick Davis is set to make a rare re-entry as Professor Filius Flitwick. He also featured as Griphook, a goblin employed at the Gringotts Wizarding Bank, according to Deadline.

As he is set to reprise Professor Flitwick, Davis teased details from the show, explaining that the episodes will be "very faithful adaptations" of JK Rowling's fantasy book series.

"I'm working on it at the moment, but I can't really tell you anything other than we're retelling those wonderful stories, but with more depth ...