John Travolta
Bolt (voice)
Susie Essman
Mittens (voice)
Mark Walton
Rhino (voice)
Malcolm McDowell
Dr. Calico (voice)
Miley Cyrus
Penny (voice)
James Lipton
The Director (voice)
Greg Germann
The Agent (voice)
Diedrich Bader
Veteran Cat (voice)
Nick Swardson
Blake (voice)
J.P. Manoux
Tom (voice)
Dan Fogelman
Billy (voice)
Kari Wahlgren
Mindy Parker (voice)
Chloë Grace Moretz
Young Penny (voice)
Randy Savage
Thug (voice)
Ronn Moss
Dr. Forrester (voice)
Grey DeLisle
Penny's Mom (voice)
Sean Donnellan
Penny's TV Dad (voice)
Lino DiSalvo
Vinnie (voice)
Todd Cummings
Joey (voice)
Tim Mertens
Bobby (voice)
Kelly Hoover
Ester (voice)
Brian Stepanek
Martin (voice)
Jeff Bennett
Lloyd (voice)
Daran Norris
Louie (voice)
John DiMaggio
Saul (voice)
Jenny Lewis
Assistant Director (voice)
Anne Lockhart
Additional Voices (voice)
Phil LaMarr
Additional Voices (voice)
June Christopher
Additional Voices (voice)
Christin Ciaccio Briggs
Additional Voices (voice)
David Cowgill
Additional Voices (voice)
Terri Douglas
Additional Voices (voice)
Jackie Gonneau
Additional Voices (voice)
Nathan Greno
Additional Voices (voice)
Forrest Iwaszewski
Additional Voices (voice)
Holly Kaneko
Additional Voices (voice)
Daniel Kaz
Additional Voices (voice)
Dara McGarry
Additional Voices (voice)
Scott Menville
Additional Voices (voice)
Jonathan Nichols
Additional Voices (voice)
Paul Pape
Additional Voices (voice)
Lynwood Robinson
Additional Voices (voice)
Karen Ryan
Additional Voices (voice)
Tara Strong
Additional Voices (voice)
Pepper Sweeney
Additional Voices (voice)
Joe Whyte
Additional Voices (voice)
Chris Williams
Additional Voices (voice)
Stephen J. Anderson
Additional Voices (voice)