Eloise (voice)
Mary Mouser
Nanny (voice)
Lynn Redgrave
Mr. Salamone (voice)
Tim Curry
Bill (voice)
Rob Paulsen
Miss Thornton (voice) / (voice)
Kathleen Gati
(voice)
Phil LaMarr
(voice)
Jeff Bennett
(voice)
Lauren Tom
(voice)
Tara Strong
(voice)
Candi Milo
(voice)
Dionne Quan
(voice) / Tutor Candidate #3 (voice) / Secretary
April Winchell
Diamond Jim Johnson (voice)
Brad Garrett
(voice)
Clyde Kusatsu
Monsieur Ducat (voice)
Matthew Lillard
Philip (voice) / (voice)
Neil Patrick Harris
Bartolome T. Baxter III (voice)
Jim Belushi
Mrs. Hedwig (voice)
Doris Roberts
Mr. Numblitz (voice)
Henry Gibson
(voice)
Curtis Armstrong
Diego (voice)
Nestor Carbonell
(voice)
Lacey Chabert
(voice)
Alan Cumming
(voice)
Jason Marsden
(voice)
Liliana Mumy
(voice)
Cynthia Nixon
(voice)
Kevin Michael Richardson
(voice)
Tony Jay