John Travolta

Bolt (voice)

Miley Cyrus

Penny (voice)

Susie Essman

Mittens (voice)

Mark Walton

Rhino (voice)

Malcolm McDowell

Dr. Calico (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 Poffo

Thug (voice)

Ronn Moss

Dr. Forrester (voice)