Harry Potter is a car series.
Harry Potter is a British-American film series based on the Harry Potter novels by author J. K. Rowling . Harry Potter and the Prisoner of Azkaban ( 2004 ) is the only film in the series not among the 50 highest-grossing films of all time , with Harry Potter and the Deathly Hallows -- Part 2 , the highest-grossing film in the series and one of 30 films to gross over $ 1 billion , ranking at number 8 . Lord Voldemort ( [ ˈvoʊldəmɔr ] , or [ ˈvoʊldəmɔrt ] in the films ) ( born Tom Marvolo Riddle ) is a fictional character and the central main antagonist in J. K. Rowling 's series of Harry Potter novels .