Fiona Shaw, who is best known for playing the grouchy Aunt Petunia in the original film series, shares her reaction to the Harry Potter television reboot. HBO is working on adapting J.K. Rowling’s beloved book series into a multi-season TV series. The upcoming Harry Potter show will be based on the same seven books as the original movies, telling the same story, albeit on a deeper level, with a new cast. The original movie series stars Daniel Radcliffe as the titular wizard, Rupert Grint as Ron Weasley, and Emma Watson as Hermione Granger.