Voice

Bram Moszkowicz

Thunder / Dylan (voice)

Brianne Siddall

Daniel

Grant George

Jack / Carlo / Zoltar voice

George Babbit

Thunder/Dylan

Murray Blue

Carlo / Jack / Zoltar (voice)

Robin Atkin Downes

Maggie

Shanelle Workman

Nurse Baxter

Cinda Adams

Chihiuahua voice

Joey Camen

Voice

Jandino Asporaat

Voice

Irene Moors

Daniel

Patrick Martens

Sr. Jeffrey McDonough voice

Edward Asner

Carla

Kathleen Gati

Voice

Jac Goderie

Mark Matthews

Kyle Hebert

Lawrence

Doug Stone

Mr. Eames

Joe Ochman

Carla

Elisa Gabrielli

Voice

Jada Borsato

Reggie Willis

Joey D'Auria

Ivan Pecnik

Izzy

Sage Sommer

Hospital children

Ella Rouhier

Hospital children

Noah Ray Strauss

Hospital children

Isabella Tatone

Joey Carmen

Hospital children

Keegan Thomas

Matthias Schweighöfer

Reggie

Jim Ward

Audrey

Susanne Blakeslee

Dieter Hallervorden

Old Lady (voice)

Lani Minella

Lasondra

Roxanne Reese

Karoline Herfurth

Mrs. Eames (voice) (as Mille Mup)

Grey DeLisle

Joachim Tennstedt

Brianne Brozey

Mike Matthews

Bill Parks

Cat sounds (archive footage; uncredited)

Frank Welker

Will Parks

Michael Sorich

Bernard Alane

Patrick Béthune

Jelle Cleymans

Luk D'Heu

Carla

Eline De Munck

Flits

Remi de Smet

Maggie

Céline Montsarrat

Eugene Levy

Kiefer Sutherland

Emily Blunt

Ewan McGregor

William Shatner

Ron Perlman