Buffy the Vampire Slayer people

There are no less than NINE people from Buffy the Vampire Slayer in this movie, seriously, are the only people they had available for teenage shows and movies a group of like twenty people that they randomize? Listed below:

1) Seth Green - Oz
2) Amber Benson - Tara
3) Nicole Bilderback - Girl in "The Wish" who gets harvested in the factory
also, she played someone named "Cordette" in the Pilot
4) Channon Roe - Jack O'Toole (The dead guy in "The Zeppo")
5) Clea DuVall - Marcie (The Invisible girl)
6) Eric Balfour - Jesse (From the first two episodes)
7) Chris Wiehl - Owen Thurman (From "Never Kill a Boy...")
8) John Patrick White - Pete Clarner ("Beauty and the Beasts")
9) Paige Moss - Veruca (Werewolf girl who seduces Oz)

Crazy right? Oh, and like half of these people were also in 24