John Travolta

Character: Bolt (voice)

Miley Cyrus

Character: Penny (voice)

Susie Essman

Character: Mittens (voice)

Mark Walton

Character: Rhino (voice)

Malcolm McDowell

Character: Dr. Calico (voice)

James Lipton

Character: The Director (voice)

Greg Germann

Character: The Agent (voice)

Diedrich Bader

Character: Veteran Cat (voice)

Nick Swardson

Character: Blake (voice)

J. P. Manoux

Character: Tom (voice)

Dan Fogelman

Character: Billy (voice)

Kari Wahlgren

Character: Mindy Parker (voice)

Chloë Grace Moretz

Character: Young Penny (voice)

Randy Poffo

Character: Thug (voice)

Ronn Moss

Character: Dr. Forrester (voice)

Grey DeLisle

Character: Penny's Mom (voice)

Sean Donnellan

Character: Penny's TV Dad (voice)

Lino DiSalvo

Character: Vinnie (voice)

Todd Cummings

Character: Joey (voice)

Tim Mertens

Character: Bobby (voice)

Kelly Hoover

Character: Ester (voice)

Brian Stepanek

Character: Martin (voice)

Jeff Bennett

Character: Lloyd (voice)

Daran Norris

Character: Louie (voice)

John DiMaggio

Character: Saul (voice)

Jenny Lewis

Character: Assistant Director (voice)

Anne Lockhart

Character: Additional Voices (voice)

Phil LaMarr

Character: Additional Voices (voice)

June Christopher

Character: Additional Voices (voice)

Christin Ciaccio Briggs

Character: Additional Voices (voice)

David Cowgill

Character: Additional Voices (voice)

Terri Douglas

Character: Additional Voices (voice)

Jackie Gonneau

Character: Additional Voices (voice)

Nathan Greno

Character: Additional Voices (voice)

Forrest Iwaszewski

Character: Additional Voices (voice)

Holly Kaneko

Character: Additional Voices (voice)

Daniel Kaz

Character: Additional Voices (voice)

Dara McGarry

Character: Additional Voices (voice)

Scott Menville

Character: Additional Voices (voice)

Jonathan Nichols-Navarro

Character: Additional Voices (voice)

Paul Pape

Character: Additional Voices (voice)

Lynwood Robinson

Character: Additional Voices (voice)

Karen Ryan

Character: Additional Voices (voice)

Tara Strong

Character: Additional Voices (voice)

Pepper Sweeney

Character: Additional Voices (voice)

Joe Whyte

Character: Additional Voices (voice)

Chris Williams

Character: Additional Voices (voice)

Stephen J. Anderson

Character: Additional Voices (voice)