| Cast list | | Elijah Wood | as | Mumble (voice) | | Brittany Murphy | as | Gloria (voice) | | Elizabeth Daily | as | Toddler Mumble, Toddler Gloria (voice) (as E.G. Daily) | | Fred Tatasciore | as | Lovelace, Elder Penguin #2, Additional Voices (voice) | | Dan Castellaneta | as | Ramon, Elephant Seal #1 (voice) | | Carlos Alazraqui | as | Nestor (voice) | | Johnny A. Sanchez | as | Lombardo, Human #3 (voice) (as Johnny Sanchez III) | | Jeffrey Garcia | as | Rinaldo (voice) | | Lombardo Boyar | as | Raul (voice) | | Cathy Cavadini | as | Norma Jean, Young Penguin #1, Human #1 (voice) (as Catherine Cavadini) | | Christopher Corey Smith | as | Memphis, Noah the Elder, Additional Voices (voice) (as Christopher Smith) | | Grey DeLisle | as | Miss Viola, Mrs. Astrakhan, Young Penguin #2, Adult Penguin #3 (voice) | | J. Grant Albrecht | as | Eggbert the Elder (voice) (as Grant Albrecht) | | Dee Bradley Baker | as | Elephant Seal #2, Alpha Sku (voice) | | John Adair | as | Adult Penguin #1 (voice) |
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