Chaos in the Multiverse (Movie)

Main Characters

 * Steve Buscemi as Randall Boggs (Monsters, Inc.) - A lizard-like monster, turned into a long purple haired man and the movie's main protagonist. In the past, he was cruel and evil, hating humans. However, after being banished to their world, he changed in positive ways. Randall was a camper in the religious camp led by Sterling, along with the former students of Monster High. After escaping with his friends, they were determined to stop Sterling's evil plan (which involved turning monsters into spectacles for humans) at all costs. Despite his past, he is no longer power-hungry. He's really helpful and devoted to his friends.
 * Nathan Fillion as Sterling Burnish (Cars 3) - A former car, turned into human and the movie's main antagonist. He leads a religious camp for supernatural beings, but his true intention is to create a monster menagerie where humans can gawk at and witness the "monsters." He assumes the guise of a Catholic businessman to hide his sociopathic nature. In reality, he merely uses religion as a tool to gain the trust of young and innocent beings. One evening, while everyone is asleep, Sterling, with the help of his henchmen, administers a substance to the camp residents. Over time, this substance transforms them into true monstrous beings, not only in appearance but in character as well. However, when the administration of the substance was failed, most of the group escapes and he teams up with every villain to find them.
 * Jemaine Clement as Garrott du Roque (Monster High) - A French gargoyle and the movie's deuterantagonist. He was initially a friend of the male students at Monster High until he sided with Sterling. He is power-hungry, cold, and sociopathic, but secretly a polymath and genius. Seeing his ambition, Sterling promised Garrott a substantial amount of money if he joined his side. Garrott has a fondness for fashion design and planned to use the promised funds to start his own business. Due to his perfectionism, he often tries to suit Sterling or other villains. He was Rochelle's ex-boyfriend and later falls in love with Bunny, with whom he has two children. He cheats on Bunny with Sunny, but ultimately chooses Twyla, who has been yearning for him since high school.
 * Justin Timberlake as Arthur Pendragon/Artie (Shrek the Third) - The old future king of Far Far Away and the movie's deuteragonist. He is a friend and teammate of Randall's crew. He is humorous, carefree, yet heroic and devoted. He doesn't feel ready for the throne at all. Initially, he feels repulsed by monsters because of his parents. However, when he learns about Sterling's plan, he tries to help the monsters without his father's knowledge. Meanwhile, his father, Uther does everything to convince Artie to embrace his destiny as a ruler. At first, he is in love with Marceline, but at the end of the story, he marries Aurora and they rule together Far Far Away.
 * Seth MacFarlane as Heath Burns (Monster High) - A flirtatious and loudmouthed fire elemental and the movie's tritagonist. At the begining of the movie, Heath was a member of the camp choir, but was eventually fired, because Sterling thought he sang to off-key. Due to this, he got into an argument with his boss, because his dream was to has a solo in the choir. After this, Sterling's henchmen humiliate and tease him every single day. For a long time, he is afraid to sing in front of others because he believes his voice is bad. However, one day Randall overhears him singing alone in the theater and is amazed by Heath's voice. Despite his qualities, Heath is hesitant to sing in front of many people for a long time. However, when Jimmy Crystal discovers his singing voice, he only sees profit in him. Layla is his girlfriend at first, but at the end of the story, he is dating Starfire.
 * Bobby Cannavale as Jimmy Crystal (Sing 2) - A cunning and devious wolf who is the boss of Crystal Entertainment and the movie's tritantagonist. When Randall's crew stays with them, Mr. Crystal accidentally hears Heath singing. From that moment on, Mr. Crystal becomes completely focused on putting Heath into his own singing group. He is the only antagonist with whom Sterling doesn't get along, as Jimmy wants to keep Heath by his side forever.
 * Taraji P. Henson as Belle Bottom (Minions: The Rise of Gru) - A master thief, who dresses as a 80s disco diva and the leader of the Vicious 6. She's also Garrott's partner-in-crime or buisness partner, after he befriends with her.
 * Olivia Olson as Marceline Abadeer (Adventure Time) - A seductive and attractive vampire woman. Initially, she worked as an exotic dancer along with Sunny and Lucy at a city's bar. She quitted, because she didn't want to be just a toy for men, she wanted to be a heroine. Despite that Dash had a huge crush on her (before Bunny), she was Artie's ex-girlfriend. Finally she gets along with Marshall.
 * Ashleigh Ball as Rainbow Dash (My Little Pony: Friendship Is Magic) - Zuma's love interest.
 * Lauren Weisman as Luna Mothews (Monster High)
 * Zac Efron as Jackson Rimes/Storm (Cars 3) - Lucy Carpenter's love interest.
 * Barrett Carnahan as Link Evilman (The Thundermans) - Ruby Roundhouse's love interest.
 * Will Friedle as Terry McGinnis/Batboy (Batman Beyond) - Ace of Clubs' love interest.
 * Aaron Taylor-Johnson as Bones (Ferdinand) - Lupe's love interest.
 * Lili Reinhart as Ashlynn Ella (Ever After High) - Devon's love interest.
 * Anne Hathaway as Darling Charming (Ever After High) - Jax's love interest.
 * Nick Jonas as Jefferson McDonough/Seaplane (Jumanji: Welcome to the Jungle) - Cleo's love interest.
 * Ryan Newman as Allison Woodson (The Thundermans)
 * Lucy Hale as Venus McFly (Monster High) - Leo's love interest.
 * Donald Glover as Marshall Wright/Marshall Lee (Adventure Time) - Marceline's love interest.
 * Scott Menville as Robin Grayson (Teen Titans) - Mackenzie's love interest.
 * Hayden Panettiere as Mackenzie Hollister (Dork Diaries) - Robin's love interest.
 * Mike Erwin as Roy Harper/Speedy (Teen Titans) - Melody's love interest.
 * Laura Bailey as Melody Piper (Ever After High) - Speedy's love interest.
 * Michael Rosenbaum as Martin West/Kid Flash (Teen Titans) - Ramona's love interest.
 * Olivia Munn as Ramona Badwolf (Ever After High) - Kid Flash's love interest.
 * Shannon Chan-Kent as Batsy Claro (Monster High) - Kendall's love interest.
 * Timothy Olyphant as Azul (Barbie as The Island Princess) - Keira's love interest.
 * Haviland Stillwell as Raquelle Feeyre (Barbie: Life in the Dreamhouse) - Max Thunderman's love interest.
 * Colin Farrell as Chase (Paw Patrol) - Viperine's love interest.
 * Yeni Alvarez as Viperine Gorgon (Monster High) - Chase's love interest.
 * Kate Higgins as Frankie Stein (Monster High) - Donnie's love interest.
 * Casper Van Dien as Hayes (Totally Spies!) - Sunny's love interest.
 * Brad Swaile as Light Yagami (Death Note) - Lucy Loud's love interest.
 * Katherine McNamara as Sunny McGrath (OC by Fixies) - Hayes' love interest.
 * Jessica DiCicco as Lucy Loud (The Loud House) - Light's love interest.
 * Evan Smith as Gil Webber (Monster High) - Lacy's love interest.
 * Ogie Banks as Clawd Wolf (Monster High) - Zoe Parker's love interest.
 * Rahart Adams as Jax Novoa (Every Witch Way) - Darling's love interest.
 * Ashleigh Ball as Keira Hothoof (Barbie The Princess & the Popstar) - Azul's love interest.
 * Chase Elliott as Chase Racelott (Cars 3) - Inside's love interest.
 * Ryan Blaney as Ryan Laney/Inside (Cars 3) - Chase Racelott's love interest.
 * Bruce Campbell as Rod Redline/Torque (Cars 2) - Odile's husband.
 * Kate McKinnon as Lupe (Ferdinand) - Bones' love interest.
 * Eric Idle as Slyly (Rudolph the Red-Nosed Reindeer: The Movie)
 * Sean Maher as Dick Grayson/Nightwing (Teen Titans) - Jazzo's husband.
 * Terry McGurrin as Kyle Katz (Totally Spies!) - Darlene's love interest.
 * Yuri Lowenthal as Zuma (Paw Patrol) - Rainbow's love interest.
 * Kelly Sheridan as as Catrine DeMew (Monster High) - Green Arrow's love interest.
 * Cheri Oteri as Aurora Briarrose/Sleeping Beauty (Shrek the Third) - Artie's love interest.
 * Paul Walker as Lars Stevenson (OC) - Astranova's love interest.
 * Yuri Lowenthal as Deuce Gorgon (Monster High) - Apple's love interest.
 * Ian James Corlett as Holt Hyde (Monster High) - Holly's love interest.
 * Lou Romano as Jackson Jekyll (Monster High) - Poppy's love interest.
 * Taron Egerton as Invisi Billy (Monster High) - Spectra's husband.
 * Wayne Knight as Dash Dawson (Totally Spies!) - Bunny's love interest.
 * Rupert Everett as Finnegan Wake (Monster High) - Cedar's love interest.
 * Michael Keaton as Chick Hicks (Cars) - Jade's love interest.
 * Owen Wilson as Monty McQueen/Lightning (Cars) - Maddie's love interest.
 * Cam Clarke as Romulus Trent (Monster High) - Maggie's husband.
 * Will Arnett as Johnny Spirit (Monster High) - Clover's husband.
 * T. J. Smith as Seth Ptolemy/Pharaoh (Monster High) - Delancy's love interest.
 * William Sadler as Ramone (Cars) - Flo's husband.
 * Jenifer Lewis as Flo (Cars) - Ramone's wife.
 * Gary Oldman as Lord Shen (Kung Fu Panda 2) - Rarity's love interest.
 * John Cleese as Cat R. Waul (An American Tail: Fievel Goes West)
 * Rebecca Black as Robecca Steam (Monster High) - Razar's love interest.
 * Missi Hale as Catty Noir (Monster High)
 * Adam Gregory as Rocky (Paw Patrol)
 * Jason Marsden as Marshall (Paw Patrol)
 * Avril Lavigne as Skye (Paw Patrol)
 * Tom Felton as Draco Malfoy (Harry Potter)
 * Evanna Lynch as Luna Lovegood (Harry Potter)
 * Brendan Fraser as Grayson (The Nut Job)
 * Hynden Walch as Ace of Clubs (Justice League)
 * Jennifer Hale as Spectra Vondergeist (Monster High)

Secondary Characters

 * Jonah Hauer-King as Daring Charming (Ever After High)
 * David Cross as Dexter Charming (Ever After High)
 * Jeff Garlin as Hopper Croakington II (Ever After High)
 * Todd Haberkorn as Sparrow Hood (Ever After High)
 * Jeremy Shada as Humphrey Dumpty (Ever After High)
 * Leah Clark as Ruby Tōjō (Rosario + Vampire)
 * Nathan Fillion as Johnny Worthington III/The Jaw (Monsters University)
 * Billy Crystal as Mike Wazowski (Monsters, Inc.)
 * John Goodman as James Sullivan/Sulley (Monsters, Inc.)
 * Ashleigh Ball as Applejack (My Little Pony: Friendship Is Magic)
 * Andrea Libman as Fluttershy (My Little Pony: Friendship Is Magic)
 * America Ferrera as Clawdeen Wolf (Monster High)
 * Salli Saffioti as Cleo de Nile (Monster High)
 * Tabitha St. Germain as Rarity (My Little Pony: Friendship Is Magic)
 * Danny Jacobs as Mr. Potato Head (Toy Story)
 * Nicole Sullivan as Mrs. Potato Head (Toy Story 2)
 * Taylor Swift as C. A. Cupida (Monster High)
 * Bobby Cannavale as Sergio De Luca (Spy)
 * Jennifer Hale as Mandy Luxe (Totally Spies!)
 * Nick Jonas as Louis/Lou (Uglydolls)
 * Mike "No Name" Nelson as Not Chuck (Cars)
 * James Marsden as Clay Wright (OC by Adventure Time)
 * Betty Gilpin as Miranda Wright (OC by Adventure Time)
 * Robert Pattinson as Cedric Diggory (Harry Potter)
 * Alice Eve as Stella Harper (Winx Club)
 * Michael Peña as Chris Harper (Winx Club)
 * Peter Kelamis as Seymour Crider (Barbie The Princess & the Popstar)
 * Jennifer Hale as Felicity Fences (Totally Spies!)
 * Danny Trejo as Stronghold (Minions: The Rise of Gru)
 * Dolph Lundgren as Svengeance (Minions: The Rise of Gru)
 * Jean-Claude Van Damme as Jean-Clawed (Minions: The Rise of Gru)
 * Lucy Lawless as Nun-chuck (Minions: The Rise of Gru)
 * Gigi Sarroino as Operetta Phantom (Monster High)
 * Chris Pine as Sky Alkyes (Winx Club)
 * Max Greenfield as Mariano Alkyes (OC by Winx Club)
 * Nicki Burke as Mira Shards (Ever After High)
 * Stephanie Sheh as Duchess Swan (Ever After High)
 * Rihanna as Prudence Step (Ever After High)
 * Elizabeth Gillies as Charlotte Step (Ever After High)
 * Daniel Radcliffe as Harry Potter (Harry Potter)
 * Emma Watson as Hermione Granger (Harry Potter)
 * Isla Fisher as Bloom Goosinov (Winx Club)
 * Jenny Slate as Elissabat Abadeer (Monster High)
 * Elizabeth Olsen as Clawdia Wolf (Monster High)
 * Erica Beck as Pearl (Finding Nemo)
 * Daniel Suárez as Danny Swervez (Cars 3) - One of Sterling's henchman, who is looks after Deuce Gorgon.
 * Darrell Wallace Jr. as Bubba Wheelhouse (Cars 3) - One of Sterling's henchman, who is looks after Holt Hyde.
 * Basshunter as Ed Truncan (Cars 3) - One of Sterling's henchman, who is looks after Jackson Jekyll.
 * Ansel Elgort as Flip Dover (Cars 3) - One of Sterling's henchman, who is looks after Clawd Wolf.
 * Will Arnett as Cam Spinner (Cars 3) - One of Sterling's henchman, who is looks after Heath Burns.
 * Barry Humphries as Barry DePedal (Cars 3) - One of Sterling's henchman, who is looks after Gil Webber
 * Greg Cipes as Rich Mixon (Cars 3) - One of Sterling's henchman, who is looks after Slo Mo.
 * Paul Conrad as Paul Conrev (Cars 3) - One of Sterling's henchman, who is looks after Invisi Billy.
 * Noah Klocek as Noah Gocek (Cars 3) - One of Sterling's henchman, who is looks after Hoodude Voodoo.
 * George Nguyen as George New-Win (Cars 3) One of Sterling's henchman, who is looks after Manny Taur.
 * Christian Roman as Chris Roamin' (Cars 3) - One of Sterling's henchman, who is looks after Porter Geiss.
 * Seann William Scott as Spikey Fillups (Cars 3) - One of Sterling's henchman, who is looks after Kieran Valentine.
 * Michael Rutter as Michael Rotor (Cars 3) - One of Sterling's henchman, who is looks after Neighthan Rot.
 * James Roderick as Jim Reverick (Cars 3) - One of Sterling's henchman, who is looks after Johnny Spirit.
 * James Patrick Stuart as Richie Gunzit (Cars 3) - One of Sterling's henchman, who is looks after Romulus Trent.
 * E.J. Holowicki as DJ (Cars) - One of Sterling's bouncer, who looks after Seth Ptolemy.
 * Jonas Rivera as Boost (Cars) - One of Sterling's bouncer, who looks after Finnegan Wake.
 * Adrian Ochoa as Wingo (Cars) - One of Sterling's bouncer, who looks after Spelldon Cauldronello.
 * Lou Romano as Snot Rod (Cars) - One of Sterling's bouncer, who looks after Bram Devein.
 * Lyndsy Kail as Kala Mer'ri (Monster High)
 * Aubrey Plaza as Peri Serpentine (Monster High)
 * Cherami Leigh as Pearl Serpentine (Monster High)
 * Timothy Olyphant as Tai (Totally Spies!)
 * Jeff Bennett as J. L. R. Junior (Totally Spies!)
 * Gwen Stefani as Gooliope Jellington (Monster High)

Minor Characters

 * Richard Petty as Strip Weathers/The King (Cars)
 * Austin Pendleton as Professor Wolfgang Otto Zündapp/Professor Z (Cars 2)
 * Ryan Newman as Honey Swamp (Monster High)
 * Hailee Steinfeld as Jane Boolittle (Monster High)
 * Paul Dooley as Sarge (Cars)
 * Charles Fleischer as Boris Goosinov (Balto)
 * Lilly Bartlam as Letty Harper (OC by DC)
 * Kevin Bacon as Balto Goosinov (Balto)
 * Haviland Stillwell as Avea Trotter (Monster High)
 * Daniel Gerson as Needleman (Monsters, Inc.)
 * Cam Clarke as Smitty (Monsters, Inc.)
 * Bresha Webb as Jackie Frost (Ever After High)
 * Evan Smith as Northwind Frost (Ever After High)
 * Steve Susskind as Jerry (Monsters, Inc.)
 * Bonnie Hunt as Mrs. Flint (Monsters, Inc.)