There were a lot of celebs in this movie.
Seriously this movie was full of celebs popping up. Some of them probably aren't that famous but I still think it's fun to watch this and just see who pops up. I'll name some now famous people that were in this (aside from the main cast).
Here's just some of the people that pop up:
Breckin Meyer
Sean Patrick Thomas (most recognizable from Save the Last Dance)
Clea DuVall
Jenna Elfman
Donald Faison (most recognizable from Scrubs and Clueless)
Melissa Joan Hart (most recognizable from Sabrina)
Freddy Rodriguez (recently guest starred on Ugly Betty and has been in other things people may know him from)
Selma Blair (most will probably remember her from Cruel Intentions)
Jerry O'Connell
Also, if anyone's ever watched Popular, the character Carmen was in this. She was the one talking about sheep and who started baaing.
Name more if you saw them.