The Wubbulous World of Dr. Seuss

Seussville – a contemporary city where Sarah Hall Small and her family live.

Jungle of Nool – a jungle that is home to Horton the Elephant, Morton the Elephant-Bird, Jane Kangaroo, Junior Kangaroo, Yertle the Turtle, the Wickershams, and the Sneels.

Kingdom of Didd – a Renaissance-like kingdom that is ruled by King Derwin.

Mount Crumpit – home of the Grinch and his dog, Max.

(performed by Bruce Lanoil in Season 1 and Martin P. Robinson in Season 2) is the main protagonist and host of the series. He starts out as a trickster, then becomes a more nurturing and optimistic host.

The Cat in the Hat

The Cat in the Hat Comes Back

Terrence McBird (performed by ) is a bird that joins the main cast in Season 2. He is the cats roommate, and is often grumpy throughout his daily activities in each episode until the end.

Anthony Asbury

– The Cat in the Hat (1996–1997), Fox in Socks (1996–1997), Alonzo, Announcer, Aunt May, Barney Balaban, Big Nosed Whozit, Big-Bottomed Rumpit, Bob the King of the Wickershams, First Mate, Grandpa Mullally, Green-Tufted Sneel (in "Yertle the King"), The Grinch's Singing Voice (in "The Guest"), Haji, The Hum-Bleeper, King Noogle of Nug, Larry Nooly, Little Wimpy Guy (puppetry only), Mayor's Servant, Money Whozit, Morton's Pink Friend, Mr. Webley, Newsboy, Onlooker #2, Pa Blozzit, Ronald Q. Clark, Yertle the Turtle (assistant in "The King's Beard"), Singing Classmate in Play, Subscription-Selling Whozit, Tiger, Uncle Dutter, Unhappy Man, The Wickershams, Zander, Zauber

Bruce Lanoil

– The Cat in the Hat (1998), Civil Servant #1, Civil Servant #2, Civil Servant #5, Civil Servant #6, The Milk, The Old Man, Goober the Dog, Paul Hall Small, Yertle the Turtle (assistant in "A Bird's Best Friend"), Friver McGee, Flying Dog, Oven

Martin P. Robinson

– Terrence McBird, Little Cat Z, The Grinch, Yertle the Turtle, Thidwick the Big-Hearted Moose, Matthew Katroom, King Derwin, Mr. Hall Small, 8th Birthday Glurk, Bald Eagle with Toupee, Bullfrog, Charlie, Dad Tidbiddle, Footman, Gink, Grandpa Jacob Kangaroo, Little Guy in Machine, Mick Maputo Bird, Morris Nooly, Morton's Purple Friend, Mrs. Zabarelli, Onlooker #3, The Royal Herald, Singing Classmate in Play, Uncle Bocks, Uncle Schmeeze, Voice from Globe, Waldo F. Sterling, The Wickershams

Anthony Asbury

– Little Cat B, Little Cat S, Jane Kangaroo, Max the Dog (1998), Pam-I-Am, Sarah Hall Small, Admiral Abigail Breeze, Annie DeLoo, Backup Singer, Bunny, The Cheese, Civil Servant #4, Daisy-Head Mayzie, Dolores Nooly, Dr. Gazeat, Elise, Eskimo Kid, Fiona Phish, Goofy Gargaloof, Green-Tufted Sneel, Happy Announcer, Heather Tidbiddle, Iguana from Xanadu, Lady Fretibula, Lady from "Up With Folks", Lulu, Ma Blozzit, Mandy, Mom Jalloo, Morton's Yellow Friend, Mrs. Dorfman, Nola Nicola Raphaella Miraldo, Poodle That Doodles, Sally Spingel-Spungel-Sporn (in "Max the Hero" and "Horton Has a Hit"), Space Creature, Sue Snue, Tallullah, The Travel Poohbah, Web-Footed Batula, White-Tuffted Floozle Bird

Stephanie D'Abruzzo

– Little Cat C, Horton the Elephant, Mr. Knox, Norval the Fish, Sam-I-Am, Felix Finkledooper, Milo, Alvin, Announcer, Armand, Backup Singer, The Birthday Bird, Celli, Delivery Bird, Downer Than Down Whozit, Earl, Flitzpizzle, The Grinch (assistant in "The Guest" and "There is Nothing to Fear in Here"), Hairy, Herbie Tidbiddle, Horace P. Riddley, Irish Setter, Julian Jeremy Jaroo Jalloo, King Lindy of Lime, Little Wimpy Guy (voice), Man from "Up With Folks", McZuff, Money Whozit, Mr. Dorfman, Muckster, Narrator, Nervous Whozit, Picnic Bug, Raffle Ticket-Selling Kid, Rock Singer, Royal Archer, Singing Lion, Spaceman, Thaddeus, Uncle Docks, Uncle Dutter (assistant), Uncle Norton the Elephant, The Wickershams, Yapper-Nap

John Kennedy

– Little Cat A (1996–1997), Junior Kangaroo (1996–1997), Max the Dog (1996-1997), Morton the Elephant Bird (1996–1997), The Grinch (assistant in "The Guest"), Aunt Mertle, Babs Balaban, Backup Singer, Civil Servant #3, Daisy's Mom, Disgusted Guest, Down Whozit, Eliza Jane Dorfman, Finnegan, Gertrude, Hopwood, Mayor Stovepipe, Molly Livingood, Mom Tidbiddle, Money Whozit, Mrs. Orissa Buttons, Onlooker #1, Number One, Phone Operator, Pink-Tufted Sneel, Princess Mindy, Queen Regina of Ka-Larry, The Sandwich, Singing Classmate in Play, Squirrel, The Teacher, Tubby Tarbaloot, Verma

Kathryn Mullen

– Little Cat A (1998), Morton the Elephant Bird (1998), Princess Tizz, Mrs. Hall Small, Grandma Hall Small, Grox, Sadie the dog

Leslie Carrara-Rudolph

– Little Cat P, Fox in Socks (1998), Junior Kangaroo (1998), Annoying Greebles, Ben, Bunky Balaban, The Clam, Eskimo Kid, The Grinch's Right Hand Puppeteer (in "The Song Of the Zubble Wump"), Mr. Moriarty Seagoin Eccles, Old Man Time, Scotty, Sid Spider, The Speaker, Smooch Smooch the pooch, Weasel from Sleezeldoo, Mink, Civil Servant #9

Tim Lagasse

– Little Cat F, Little Cat N, Lulu's Dog, Zubble-Wump, Snake, Mama Gink

Pam Arciero

– Uncle Berklummer

Bill Barretta

– Elwood the Jester (in "The King's Beard"), Lester McBird (in "Lester Leaps In")

Joey Mazzarino

Vicki Eibner – Puffy the Cat (in "Cat's Play"), Snooty Bird

– Sneels

Heather Asch

– Civil Servant #7, Poochie the poodle

Nikki Tilroe

– Binkham Tamino McDoyal the Third

Brian Meehl

– Sally Spingel-Spungel-Sporn (in "The Muckster")

Camille Bonora

Jim Kroupa – Annoying Greebles, Dad Jalloo, Doily-Cart, Mr. Wimpletwerp, Space Creature, Zippedy Quick

– Snoozer

Jerry Nelson

– Bird ( in "The King's Beard"), Delivery Man

John Tartaglia

– Little Cat Fleep

Kevin Clash

The puppet used for Annie DeLoo was later used in , for Billy in episode 17 of Statler and Waldorf: From the Balcony, in Puppet Up! alongside the Flitzpizzle and another Whatnot from this show as well as other productions including The Happytime Murders.

It's a Very Merry Muppet Christmas Movie

Each of the Whozits have appeared as different characters in , and years after the purchase of The Muppets, started appearing in Henson Alternative productions.

Mopatop's Shop

One of the Wickersham Brothers was seen on a couple of segments, the "Jump" song (with India Arie) on the Happy Healthy Monsters resource video, and as the Nascount Greasemonkey from Episode 4154.

Sesame Street

at IMDb

The Wubbulous World of Dr. Seuss