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)