Note: If you see a character's name instead of the voice actor or voice actress, it's because they either don't have a voice actor or I couldn't find the voice actor or actress.

Guardians of Childhood:

Alec Baldwin as North

Isla Fisher as Tooth

Hugh Jackman as Bunnymund

Sandy as himself

Big Four:

Chris Pine as Jack Frost

Mandy Moore as Rapunzel

Kelly Macdonald as Merida

Jay Baruchel as Hiccup

JiMePeJa:

Joseph Gordon-Levitt as Jim Hawkins

Tara Strong as Melody

Blayne Weaver as Peter Pan

Harriet Owen as Jane

Keyblade Wielders:

Haley Joel Osment as Sora

David Gallengher as Riku

Hayden Panettiere as Kairi

Jason Dohring as Terra

Willa Holland as Aqua

Jesse McCartney as Ven

Other Kingdom Hearts characters: (singing)(they'll be mentioned more in the sequel)

Jesse McCartney as Roxas

Brittany Snow as Namine

Justin Cowden as Hayner

Sean Marquette as Pence

Jessica DiCicco as Olette

Villains:

Jude Law as Pitch

Donna Murphy as Gothel

Mor'du as himself

Red Death as itself

Michael Wincott as Scroop

Pat Carroll as Morgana

Corey Button as Hook

Susanne Blakeslee as Maleficent

Other Disney Characters:

Scott Weinger as Aladdin

Linda Larkin as Jasmine

Jerry Orbach as Lumiere

David Ogden Stiers as Cogsworth

Angela Lansbury as Mrs. Potts

Bradley Pierce as Chip

Johnny Depp as Mad Hatter

Mia Wasikowska as Alice Kingsleigh

Helena Bonham Carter as Red Queen

Anne Hathaway as White Queen

Crispin Grover as Stayne - Knave of Hearts

Michael Sheen as White Rabbit

Stephen Fry as Cheshire Cat

Barbara Windsor as Dormouse

Paul Whitehouse as March Hare

Matthew Broderick as Simba

Neve Campbell as Kiara

Robert Guillaume as Rafiki

Moira Kelly as Nala

Nathan Lane as Timon

Jason Marsden as Kovu

Suzanne Pleshette as Zira

Ernie Sabella as Pumbaa

Jennifer Lien as Vitani

Jason Alexander as Hugo

Tom Hulce as Quasimodo

Tony Jay as Frollo

Charles Kimbrough as Victor

Demi Moore as Esmeralda

Anika Noni Rose as Tiana

Bruno Campos as Prince Naveen

Keith David as Dr. Facilier

Michael-Leon Wooley as Louis

Jim Cummings as Ray

Jenifer Lewis as Mama Odie

Britt Robertson as Allie Pennington

Gregg Sulkin as Will Wagner

Joey Pollari as Miles

Devon Graye as Marco

Molly C. Quinn as Jen

Don Lake as Allie's father

Christopher Tavarez as Lance Benwick

Ingrid Park as Allie's mother

Steve Valentine as Mr. Moore

Samuel E. Wright as Sebastian

Cam Clarke as Flounder

Non-Disney Characters:

Jack Palance as Lord Rothbart

Michelle Nicasto as Odette

Alana Mansour as Zoe Shannon

Shelley Conn as Elisabeth Shannon

Jason O'Mara as Jim Shannon

Jane's family:

Kath Soucie as Wendy

Andrew McDonough as Danny

Roger Rees as Edward

Jim's family:

Laurie Metacalf as Sarah Hawkins

Melody's, Kairi's and Peter's family:

Jodi Benson as Ariel

Rob Paulsen as Eric

Kenneth Mars as King Triton

Hiccup's family:

Gerald Butler as Stoick

Rapunzel's family:

Kari Wahlegren as Rapunzel's mother

Rapunzel's father as himself

Sora's family:

Paige O'Hara as Belle

Robby Benson as Beast

Rex Everhart as Maurice

Merida's family:

Emma Thompson as Elinor

Billy Connolly as Fergus

Hamish, Harris and Hubert as themselves

Melody's friends: (mentioned)

Max Casella as Tip

Stephen Furst as Dash

Hiccup's friends:

America Ferrera as Astrid

Jonah Hill as Snoutlout

Christopher Mintz-Plasse as Fishlegs

T.J. Miller as Ruffnut

Kristen Wiig as Tuffnut

Peter's friends:

Spencer Breslin as Cubby

Bradley Pierce as Nibs

Quinn Beswick as Slightly

Aaron Spann as Twins

Jim's friends:

Brian Murray as Silver

Martin Short as BEN

Dane A. Davis as Morph

Emma Thompson as Captain Amelia

David Hyde Pierce as Doctor Doppler

Believers:

Naomi Scott as Nicole Johnson

Bella Thorne as Annika Michaels

Vanessa Hudgens as Bailey Dawson(mentioned)

Landon Liboiron as Ethan Michaels

Dianna Agron as Olivia Woods(mentioned)

Heather Morris as Allie Woods(mentioned)

Diego Boneta as Alex Santiago(mentioned)

Dakota Goyo as Jamie Bennett

Georgie Grieve as Sophie Bennett

Olivia Mattingly as Pippa

Melissa Benoist as Marcy

Zendaya as Sapphire Michaels

Transformations:

Lion cub Sora as himself

Rain as Horse Jane

Koda as Bear cub Hiccup