Good Boy!

Molly Shannon

Mrs. Baker

Liam Aiken

Owen Baker

Matthew Broderick

Hubble (voice)

Donald Faison

Wilson (voice)

Cheech Marin

The Greater Dane's Henchman (voice)

Brittany Murphy

Nelly (voice)

Vanessa Redgrave

The Greater Dane (voice)

Carl Reiner

Shep (voice)