Haleigh Nickerson

Niklaus "Klaus" Mikaelson is a fictional character from the novel The Vampire Diaries and the American television show by the same name, first appearing in The Vampire Diaries: The Struggle (1991) as a big bad, the primary antagonist, and the first known hybrid of an Original vampire and a werewolf. Created by L. J. Smith and adapted by Julie Plec and Kevin Williamson, the character was partly based on Klaus Mikaelson, portrayed by the British actor Joseph Morgan across The Vampire Diaries Universe.