Director Amy Heckerling cast Taylor Negron as "Pizza Guy," delivering a pizza to vampire Sigourney Weaver. Heckerling also cast Negron as "Pizza Guy" in her first feature film as director, "Fast Times at Ridgemont High," delivering a pizza to Sean Penn in class.
Danny's last name is Horowitz. Obviously a reference to, arguably Alicia Silverstone's most famous role, Cher Horowitz in Clueless, which was also directed by Amy Heckerling.
The character Renfield shares the same name as a character from the original novel of Dracula and many of the movies that were born from it. In the novel Renfield is a living human who serves Dracula, especially as a guardian, in hopes that Dracula will turn him into a vampire someday in the future.
Second collaboration between Alicia Silverstone, Wallace Shawn and Director Amy Heckerling.