Jerry O'Connell as Hayden (voice)

Dick Van Dyke as Yusop (voice)

Ja Rule as Fenn (voice)

Tionne 'T-Boz' Watkins as Jarvik (voice)

Chris Daughtry as Counselor Olaf (voice)

Debi Derryberry as Counselor Jessica / Adrian / Kid #1 (voice)

Dylan Vox as Finntoozler (voice)

Greg Cipes as Oppenhop / Flint / Klorg (voice)

Tammy Klein as Sapseat (voice)

Aaron Witlin as Additional Voices

Ana Florit as Additional Voices

Andi Royer as Additional Voices

Brie Cubelic as Additional Voices

Bryan Dietzman as Additional Voices

Emily Mae Heller as Additional Voices

Malia Suarez as Additional Voices

Pierre Charpilloz as Additional Voices

Ryan Ebert as Additional Voices