Reparto (por orden de créditos)
Ryan Seacrest
Self - Host
Simon Cowell
Self - Judge
Randy Jackson
Kimberley Locke
Self - Finalist
Paula Abdul
Clay Aiken
Ruben Studdard
Joshua Gracin
Trenyce
Carmen Rasmusen
Kimberly Caldwell
Rickey Smith
Julia DeMato
Corey Clark
Michael Druck
Self - Contestant
Charles Grigsby
Jeff Dlugolecki
Self
Olivia Newton-John
Self - Guest Judge
Gladys Knight
Diane Warren
Lionel Richie
Smokey Robinson
Robin Gibb
Neil Sedaka
Verdine White
Lamont Dozier
Ben Hausbach
Candice Coleman
Rebecca Bond
Hadas
Vanessa Olivarez
Jacob John Smalley
Jennifer Fuentes
Brian Dunkleman
Self - Host (2006)
Kelly Clarkson
Justin Guarini
Jim Verraros
Nikky D. Williams
Jules Sanchez