Dee Bradley Baker as Louie (voice)

Jason Alexander as Father (voice)

Mary Steenburgen as Mother (voice)

Reese Witherspoon as Serena (voice)

Seth Green as Boyd (voice)

Carol Burnett as Mrs. Hammerbotham (voice)

Joe Mantegna as Monty (voice)

Sam Gifaldi as Sam the Beaver (voice)

Melissa Disney as Billie (voice)

Kath Soucie as Serena (cygnet) / Paramedic / Newscaster (voice)

E. G. Daily as Ella (voice)

Pamela Adlon as A.G. Skinner (voice)

Steve Vinovich as Maurice / Roger (voice)

Gary Anthony Williams as Sweets (voice)

Corey Burton as Senator (voice)

Michael Winslow as Chief (voice)

David Jeremiah as Squirrel / Hawk (voice)

Julie Nathanson as Felicity (voice)

Jack Angel as Justice of the Geese (voice)

Dana Daurey as Apathy (voice)

Michael Kostroff as Waiter (voice)

Lee Magnuson as Clerk (voice)

Steve Franken as Bud (voice)

Norman Parker as Policeman (voice)