• 
  David DeLuise

  Steven
• 
  Jed Rees

  Roland
• 
  Danny Woodburn

  Butch (voice)
• 
  Reggie De Leon

  Shep
• 
  Denisse Ojeda

  Ida
• 
  Makenzie Moss

  Lou
• 
  John Ratzenberger

  Grandpa Growl (voice)
• 
  Diedrich Bader

  Kano (voice)

• 
  Jorge Diaz

  Julio (voice)
• 
  April Hong

  Ming (voice)
• 
  Jonathan Mangum

  Rover
• 
  Melanie Merkosky

  Reporter 1
• 
  George Newbern

  Bark (voice)
• 
  Sheridan Smith

  Cece (voice)
• 
  Steve Valentine

  Simon Growl (voice)

• 
  Maulik Pancholy

  Raji (voice)
• 
  Nikki Blonsky

  Lady Paw Paw (voice)
• 
  Anna McRoberts

  Dignitary
• 
  Kaitlyn Maher

  Tiny
• 
  Steve Zaragoza

  Juan (voice)
• 
  Blesson Yates

  Diggy (voice)
• 
  Brian Hull

  Jimmy Kibble / Canine West (voice)
• 
  Daryl Yates

  Rollin
• 
  Judah Marley

  Gnarly Jr.
• 
  Ziggy Marley

  Dog Gnarly