- Geoffrey Arend
- Charles 'Upchuck' Ruttheimer III
- Rand Bridges
- Professor Bill Woods
- Lisa Collins
- Andrea / Sandi Griffin / Brittany Taylor (voice)
- Michelle Damato
- (voice)
- Sarah Drew
- Stacy Rowe
- Bart Fasbender
- Andrew Landon
- Amanda Fox
- Katherine 'Kay' Sloane
- Alvaro J. Gonzalez
- Trent Lane
- Tracy Grandstaff
- Daria Morgendorffer
- Russell Hankin
- Tom Sloane
- Jessica Hardin
- Lindy
- Wendy Hoopes
- Jane Lane / Helen Barksdale Morgendorffer / Quinn Morgendorffer (voice)
- Steven Huppert
- Joey
- Jessica Cydnee Jackson
- Jodie Abigail Landon
- Karen Kunkel
- (voice)
- Nora Laudani
- Ms. Angela Li
- Stefanie Layne
- Lisa
- Becca Lish
- Lisa Goldwin
- John Lynn
- Sick, Sad World Announcer
- Ben McCrea
- Man at Governor's Park
- Gilat Meltzer
- (voice)
- Daniel Milledge
- (voice)
- Tim Novikoff
- Jeffy
- Ashley Paige Albert
- Ms. Janet Barch / Tiffany Blum-Deckler (voice) (as Petunia)
- Julian Rebolledo
- Jake Morgendorffer
- Maria Rodas
- (voice)
- Fisher Stevens
- (voice)
- Brad Sussman
- (voice) (as Bradford Jay Sussman)
- Marc Thompson
- Mr. Anthony DeMartino / Mr. Timothy O'Neill / Kevin Thompson / Jamie White (voice)
- M. Ting
- (voice)
- Laurine Towler
- Michele Landon
- Jennifer Visalli
- Shauna
- Amir Williams
- Michael Jordan 'Mack' Mackenzie
