The Vampire Diaries features an ensemble cast of nine regular speaking roles which were mainly adapted from the book series. Most of the characters are teenagers, but the cast also includes adult roles. The characters are mainly humans and vampires, but the show also includes various other supernatural beings. The series has not yet revealed all of the characters, namely Meredith Sulez, Klaus and Margaret Gilbert; the latter character has been changed to a male and is shown as older. The character of Matt Honeycutt is depicted as Vicki Bennett's brother in the series and they have both taken the surname of "Donovan".