Stephen Root
Rhino / Start (voice)

Diedrich Bader
Saber-Toothed Tiger (voice)

Alan Tudyk
Saber-Toothed Tiger / Freaky Mammal (voice)

Lorri Bagley
Female Sloth (voice)

Jane Krakowski
Female Sloth (voice)

Peter Ackerman
Dodo / Freaky Mammal (voice)

P.J. Benjamin
Dodo (voice)

Josh Hamilton
Dodo / Aardvark (voice)

Denny Dillon
Glypto (voice)

Mitzi McCall
Glypto (voice)