Sarah Carter (Katherine) and Natassia Malthe (Sonja) both appeared alongside each other in video-game adaptation DOA: Dead or Alive (2006).
One year after portraying a werewolf in this movie, Natassia Malthe would play a vampire in Bloodrayne 2 (2008).
Both Jason and Matthew appeared in the The Grudge movies, Jason appeared in the first one and Matthew appeared in the last two installments.
Jessica Huras's debut.
Natassia Malthe will go on to play a vampire in the last two movies of Bloodrayne.