HBO’s upcoming “Harry Potter” series is casting actor Peter Serafinowicz as Peeves the Poltergeist, a character from J.K. Rowling’s books who does not appear in the original film adaptations. Multiple outlets report that Serafinowicz will bring the cheeky Hogwarts ghost to the screen, with the role positioned as a notable inclusion for the series. The reports add that the show is planned as a longer-form adaptation of the novels, and that it is moving ahead with casting for major roles; Dominic McLaughlin is identified as Harry Potter in one account. Polygon and Variety also frame Peeves as a fan-favorite cut from the movies, now set to be included in the HBO version. Variety, in particular, characterizes Peeves as a troublemaking figure in Hogwarts and confirms Serafinowicz’s casting as part of the series. Across sources, the core points are consistent: Serafinowicz will play Peeves, and the character is absent from the films but part of the books that the series adapts.