At the beginning of the movie, if you listen carefully to the tuba and tambourine zombies in the town bandstand, they are playing notes from "The Gonk", the mall music from George A. Romero's L'aube des morts (1978).
George A. Romero was so impressed with Simon Pegg and Edgar Wright's Shaun et les zombies (2004), that he asked them to appear in this, the fourth part of his "Dead" series, and they appear as the photo-booth zombies in the carnival and barroom sequence. They also feature prominently in the artwork for the Unrated Director's Cut.
George A. Romero's daughter appears in the film. She is the soldier who shoots the zombie on the electrified fence.
This movie's Pittsburgh premiere was at the Byham Theatre, which used to be called the Fulton Theatre. This theater, when it was still the Fulton, was the same theater where La nuit des morts vivants (1968) premiered in 1968.
Boyd Banks: Boyd Banks, the actor who played Tucker in L'aube des morts (2004) and "White Man" in George A. Romero's Diary of the Dead: Chroniques des morts-vivants (2007), plays "the butcher" in this movie.
George A. Romero: His voice can be heard as one of the puppets in the children's show, saying, "Take that, you smelly zombie!"