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)

Delta Burke
Barbara Ann (voice)

Kevin Nealon
Mr. Baker

Hunter Elliott
Frankie

Mikhael Speidel
Fred

Brittany Moldowan
Connie Fleming

George Touliatos
Mr. Leone

Patti Allan
Ms. Ryan

Ben Immanuel
Wilson's Dad (as Benjamin Ratner)

Peter Flemming
Wilson's Other Dad

Paul Vogt
Bob the Dog Catcher (as Paul C. Vogt)

Brenda Crichlow
Mrs. Fleming (as Brenda M. Crichlow)

D. Harlan Cutshall
Mr. Fleming