Ryan Seacrest
Self - Host (45 eps)
Simon Cowell
Self - Judge (45 eps)
Randy Jackson
Self - Judge (45 eps)
Paula Abdul
Self - Judge (45 eps)
Barry Manilow
Self - Guest Judge (3 eps)
Camile Velasco
Self (3 eps)
Jon Peter Lewis
Self (3 eps)
Jasmine Trias
Self (3 eps)
Jennifer Hudson
Self (3 eps)
John Stevens
Self (3 eps)
George Huff
Self (2 eps)
Clay Aiken
Self - Guest Host (2 eps)
LaToya London
Self (2 eps)
Matthew Rogers
Self (2 eps)
Steven Cojocaru
Self (1 eps)
Elton John
Self - Mentor (1 eps)
Jason Priestley
Self (1 eps)
Kelly Clarkson
Self - Guest (1 eps)
Kimberly Caldwell
Self - Guest Host (1 eps)
Diana DeGarmo
Self (1 eps)
Paul Anka
Self - Guest (1 eps)
Fantasia Barrino
Self (1 eps)
Guy Sebastian
Self - Audience Member (uncredited) (1 eps)
Henry Winkler
Self - Audience Member (uncredited) (1 eps)
Ray Romano
Self - Interviewee / Audience Member (1 eps)
Sharon Osbourne
Self - Interviewee / Audience Member (1 eps)
Ruben Studdard
Self - Guest (1 eps)
Kimberley Locke
Self - Guest Performer (1 eps)
Amy Adams
Self (1 eps)
Tamyra Gray
Self - Guest (1 eps)