- Paul Iacono - Neil Baczynsky
- Charles S. Dutton - Mr. James Dowd
- Kelsey Grammer - Mr. Martin Cranston
- Anna Maria Perez de Tagle - Joy
- Megan Mullally - Ms. Fran Rowan
- Debbie Allen - Ms. Angela Simms
- Cody Longo - Andy Matthews
- Julius Tennon - Denise's Dad
- April Grace - Denise's Mom
- Michael Hyatt - Malik's Mom
- Laura Johnson - Alice's Mom
- James Read - Alice's Dad
- Ryan Surratt - Eddie
- Howard Gutman - Neil's Dad
- Dale Godboldo - Music Executive
- J.T. Horenstein - Dance Teacher
- Stephanie Mace - Mr. Cranston's Assistant
- Patrick Censoplano - Brooklyn Boy
- Donte 'Burger' Winston - Hype Man
- Hopsin - Senior Rapper
- Ak'Sent - Female Rapper
- Tynisha Keli - Female Singer
- Kate Mulligan - Karaoke Singer
- Donnie Smith - Film Set PA
- Earl Carroll - Camera Shop Clerk
- Oren Waters - Singing Homeless Man
- Tim Jo - Korean Boy
- Michael Eric Reid - Red Haired Boy
- Leslie Ishii - Administrator
- Gavin Turek - Ethnic Girl
- Paulina Gretzky - Gorgeous Blonde Senior
- Alex Liddy - Friend of Brooklyn Boy
- Bre Morgan - Intense Girl
- Anastasia Boissier - Little 10 Year Old Girl
- Kasha Kropinski - Ballerina
- Jessie Sherman - Drama Helper
- Jeremy Hudson - Dancer Boy
- Mallauri Esquibel - Dancer Girl
- Annika Daniel - Marco's Little Sister
- Sophia Daniel - Marco's Little Sister
- Tiffany Espensen - Joy's Sister
- Eli Myers - Cafeteria Jam Piano Student
- Seth Daly - Cafeteria Jam Violin Student
- Miss Lola Rose - Butcher Shop Customer
- Nisha Bedi - Drama Student
- Nick Grimes - Drama Student
- Angela Alexander - Drama Student
- Eva Ramirez - Drama Student
- Whitney Barncord - Drama Student
- Brittany Magill - Drama Student
- Smyth Campbell - Drama Student
- Gino Barletta - Drama Student
- Philomena Bankston - Drama Student
- Ronald Antwine - Nightclub Bouncer
- Sharon Pierre-Louis - Broadway Girl
- Hailey Villaire - Opera Girl
- Deanna Knott - Club Jam Vocal #1
- Krys Ivory - Club Jam Vocal #2
- Betty Griffin-Keller - Orchestra Conductor
- Loriel Hennington - Dancer
- Colleen Craig - Dancer
- Katrina Norman - Dancer
- Jason Williams - Dancer
- Rey Barcena - Dancer
- Ava Bernstine-Mitchell - Dancer
- Shelby Rabara - Dancer
- Malerie Grady - Dancer
- Jameson Perry - Dancer
- Brandon O'Neal - Dancer
- Galadriel Stineman - Dancer
- Moira 'Anjolie' Marfori - Dancer
- Kelli Shimada - Dancer
- Anthony Carr - Dancer
- Nick Lanzisera - Dancer
- Dominique Kelley - Dancer
- Bobby Amamizu - Dancer
- Shari Tiandra Tinker - Dancer
- Mike Munich - Dancer
- Chris Liu - Dancer
- Danny Axley - Dancer
- Britt Stewart - Dancer
- Ashley Galvan - Dancer
- KC Monnie - Dancer
- Ryan Novak - Dancer
- Antonio Hudnell - Dancer
- Kathryn McCormick - Dancer
- Tyne Stecklein - Dancer
- Jermaine McGhee - Dancer
- Tracy Shibata - Dancer
- Krystal Ellsworth - Dancer
- Lisette Alvarez - Ballerina (uncredited)
- Jennifer Bliman - French Horn Girl (uncredited)
- Johanna Braddy - Katie (uncredited)
- Amelia Brantley - Gospel Choir Member (uncredited)
- Dani Jayden - Gospel Singer / Student (uncredited)
- Kotoko Kawamura - Old Woman at Subway (uncredited)
- Kole - Guitarist (uncredited)
- Lock Lee - Karaoke Server (uncredited)
- Maria Lingbanan - Gospel Choir Member / Student (uncredited)
- Jeremy Morgan - Club Patron (uncredited)
- Anoush NeVart - Dance Studio Accompanist (uncredited)
- Rudy Villagrana - Butcher (uncredited)
- Adam Waller - Graduation Guest (uncredited)
- Julia Faye West - Dancer (uncredited)
-
Kevin Tancharoen
-
Allison Burnett
- Mark Canton
- Gary Lucchesi
- Deborah Aquila
- Tom Rosenberg
- Tricia Wood
- Mark Isham
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