Juliet Donenfeld
Sally Squirrel (voice)

Elvis Costello
Pete's Dad (voice)

Diana Krall
Pete's Mom (voice)

Alyson Stoner
Callie (voice)

Atticus Shaffer
Grumpy Toad (voice)

Indie Nameth
Emma the Pug (voice)

Jacob Tremblay
Pete the Cat (voice)

Django Marsh
Bob (voice)

Felix Avitia
Gustavo (voice)

Jessica Biel
Bonnie Burrow (voice)

Camryn Jones
Boo Burrow

Phill Jupitus
Wilson (voice)

KT Tunstall
Catalina (voice)

Evan Agos
Dennis (voice)

Dave Matthews
Papi (voice)

Jim Parsons
Stan (voice)

Jesse Tyler Ferguson
Syd (voice)

'Weird Al' Yankovic
Wawa Weasel (voice)