- Charlyne Yi - Alice (voice)
- Charlyne Yi - Alice / Additional Voices (voice)
- Antonio Raul Corbo - Oscar (voice)
- Antonio Raul Corbo - Baby Dylan (Alice) (voice)
- Elijah Wood - Saxophone (voice)
- Mike Birbiglia - Howard (voice)
- Melanie Lynskey - Sun (voice)
- Issac Ryan Brown - Max (voice)
- Daphne Thomas - Lem (voice)
- Maggie Lowe - Additional Voices (voice)
- Keith Szarabajka - Additional Voices (voice)
- Alexa Nisenson - Alexa (voice)
- Daniel Hagen - Additional Voices (voice)
- Richard Kind - Shark (voice)
- Richard Kind - Hedgehog's Dad (voice)
- Richard Kind - Additional Voices (voice)
- Nikki Castillo - Betsy (voice)
- Nikki Castillo - Betsy / Sarah (voice)
- Eric Bauza - Additional Voices (voice)
- Ethan Maher - Additional Voices (voice)
- Ethan Maher - Puddle (voice)
- Ethan Maher - Boyband (voice)
- Ethan Maher - Dream Boy (Susie) (voice)
- O'Neill Monahan - Additional Voices (voice)
- Luke Lowe - Additional Voices (voice)
- Luke Lowe - Basketball (voice)
- Caleb McLaughlin - Ghost (voice)
- Alfred Molina - Andy (voice)
- Alfred Molina - Additional Voices (voice)
- Alfred Molina - Monster Under the Bed (voice)
- Alfred Molina - Monster Under the Bed / Oscar's Dad (voice)
- Sam Lavagnino - Pepper (voice)
- Sam Lavagnino - King (voice)
- Sam Lavagnino - Alien King (voice)
- Sam Lavagnino - Additional Voices (voice)
- Sam Lavagnino - Pepper / King (voice)
- Sam Lavagnino - Pepper / Alien (voice)
- Kathleen Wilhoite - Sue (voice)
- Kathleen Wilhoite - Oscar's Mom (voice)
- Nat Faxon - Popular Banana Split (voice)
- Andre Robinson - Oliver (voice)
- Andre Robinson - Additional Voices (voice)
- Andre Robinson - Decent Boi (Hedgehog) (voice)
- Brenda Vaccaro - Godmonster (voice)
- Lorraine Bracco - Werewolf Queen (voice)
- Juju Journey Brener - Additional Voices (voice)
- Rylee Alazraqui - Additional Voices (voice)
- Rylee Alazraqui - Alien (voice)
- Brian Baumgartner - Storm Cloud (voice)
- Bobcat Goldthwait - Monk Voice (voice)
- Mattea Quin - Lem (voice)
- Cedric the Entertainer - Moon (voice)
- Cedric the Entertainer - Additional Voices (voice)
- Lori Petty - Ms. Pinch (voice)
- Paula Poundstone - Paulette (voice)
- Garrett Davis - Toothpaste (voice)
- Kate Flannery - Georgina (voice)
- Alia Shawkat - Blanche (voice)
- Alia Shawkat - Butter Goth (voice)
- Alia Shawkat - Blanche / Werefloer (voice)
- Alia Shawkat - Cinnamon Raisin Toast (voice)
- Betsy Sodaro - Skadi (voice)
- Jane Lynch - Skadi's Mom (voice)
- Fortune Feimster - Ava (voice)
- Fortune Feimster - Additional Voices (voice)
- Fortune Feimster - Ava / Additional Voices (voice)
- Fortune Feimster - Mrs. Goose (voice)
- Fortune Feimster - Dolly (voice)
- Fortune Feimster - Vern / Dolly (voice)
- Don Lake - Doc Hogsbottom (voice)
- Don Lake - Additional Voices (voice)
- Whoopi Goldberg - Barb (voice)
- Cole Sanchez - Additional Voices (voice)
- Cole Sanchez - Ghost Dad Cole (voice)
- Cole Sanchez - Ghost Dad #2 (voice)
- Cole Sanchez - Frog King (voice)
- Cole Sanchez - Freddie (voice)
- Cole Sanchez - Alligator 1 (voice)
- Cole Sanchez - Yeti Orderly (voice)
- Cole Sanchez - Salt Parasite (voice)
- Cole Sanchez - Vann (voice)
- Cole Sanchez - Alligator Chef (voice)
- Kimiko Glenn - Margot (voice)
- Kimiko Glenn - Margot / Additional Voices (voice)
- Kimiko Glenn - Additional Voices (voice)
- Kimiko Glenn - Margot / Ski Bat (voice)
- Rachel Dratch - Bernadette (voice)
- Carol Kane - Barb Jr. (voice)
- Wanda Sykes - Ethel (voice)
- John Hodgman - Bartholomole (voice)
- Kathleen Turner - Mole Judge (voice)
- Justin Felbinger - Dungeon Doug (voice)
- Bobby Moynihan - Jimjams (voice)
- Bobby Moynihan - Mortimer / Melvin (voice)
- Bobby Moynihan - Mortimer (voice)
- Bobby Moynihan - Toad Doctor / Jimjams (voice)
- Bobby Moynihan - Mortimer / Melvin / Jimjams (voice)
- Bobby Moynihan - Additional Voices (voice)
- Bobby Moynihan - Toad Doctor (voice)
- Bobby Moynihan - Peach Stand Guy / Additional Voices (voice)
- Bobby Moynihan - Jimjams / Additional Voices (voice)
- Bobby Moynihan - Tub (voice)
- Bobby Moynihan - Melvin (voice)
- Bobby Moynihan - Dennis (voice)
- Bobby Moynihan - Old Log Ghost (voice)
- Jack Stanton - Additional Voices (voice)
- Lesley Nicol - Ramona (voice)
- Lesley Nicol - Ramona / Additional Voices (voice)
- Lesley Nicol - Ramona / Emma (voice)
- Lesley Nicol - Ramona / Mo (voice)
- Cooper J. Friedman - Caboodle (voice)
- Steve Berg - Harry (voice)
- Jo Firestone - Mallory (voice)
- Melissa Villaseñor - Psychic (voice)
- Bella Ramsey - Ramona Age 15 (voice)
- Shen Yao - Additional Voices (voice)
- Wallace Shawn - Barry (voice)
- Wallace Shawn - Morris Mole (voice)
- Wallace Shawn - Pete (voice)
- Stephen Root - Stuart (voice)
- Stephen Root - Additional Voices (voice)
- Stephen Root - Dean Stuart / Additional Voices (voice)
- Stephen Root - Prime Monister (voice)
- Keith Ferguson - Additional Voices (voice)
- Keith Ferguson - FM Dog (voice)
- Keith Ferguson - Ghost Pendarvis (voice)
- Lucian Perez - Glazed Ham (voice)
- Max Mitchell - Prophecy Alien (voice)
- Max Mitchell - Additional Voices (voice)
- Max Mitchell - Jeremiah (voice)
- Max Mitchell - Patootie (voice)
- Gaille Heidemann - Additional Voices (voice)
- Gaille Heidemann - Helen (voice)
- Kent Osborne - Additional Voices (voice)
- Kent Osborne - Chet (voice)
- Kent Osborne - Ghost Dad Kent (voice)
- Kent Osborne - Alligator Chef (voice)
- Kent Osborne - Ghost Dad #1 (voice)
- Kent Osborne - Grigory Midnight / Additional Voices (voice)
- Sally Struthers - Rose (voice)
- Sally Struthers - Additional Voices (voice)
- Ashly Burch - Additional Voices (voice)
- Jason Maybaum - Fife (voice)
- Kevin Michael Richardson - Additional Voices (voice)
- Kevin Michael Richardson - Waylon (voice)
- Kevin Michael Richardson - Toast Ghost (voice)
- Kevin Michael Richardson - Langston / Waylon (voice)
- Kevin Michael Richardson - Professor (voice)
- Kevin Michael Richardson - Yeti Elder (voice)
- Kevin Michael Richardson - Time (voice)
- Kevin Michael Richardson - Auctioneer (voice)
- Laraine Newman - Hedgehog's Mom (voice)
- Laraine Newman - Hedgehog's Mom / Additional Voices (voice)
- Laraine Newman - Additional Voices (voice)
- Loretta Devine - Sea Cow (voice)
- Cole Escola - Sea Slug (voice)
- Elsie Fisher - Sea Snail (voice)
- Scott Hoying - Blobfish (voice)
- Frances Conroy - Ms. Clearinet (voice)
- Frances Conroy - Lead Patrol Elf (voice)
- Kate Micucci - Accordion (voice)
- Kate Micucci - Additional Voices (voice)
- Eva Victor - Sea Susie (voice)
- Roz Ryan - Additional Voices (voice)
- Roz Ryan - Tammy / Patrice (voice)
- Roz Ryan - The Death Cap (voice)
- Roz Ryan - Tammy (voice)
- Roz Ryan - Grandma Tumpet (voice)
- Roz Ryan - Elder (voice)
- Roz Ryan - Patrice (voice)
- Fred Melamed - Monk Receptionist / Additional Voices (voice)
- Fred Melamed - Monk Receptionist (voice)
- Audrey Wasilewski - Yeti Nurse (voice)
- Audrey Wasilewski - Red Haired Moom (voice)
- Remy Edgerly - Noodle / Additional Voices (voice)
- Remy Edgerly - Mystical Alien (voice)
- Remy Edgerly - Noodle (voice)
- Keith David - Tummy (voice)
- Keith David - Lithophone (voice)
- Travis McElroy - Cutie (voice)
- Fred Stoller - Ghost the Earnest (voice)
- Lorraine Toussaint - Emily Ghost (voice)
- Maria Bamford - Sandy (voice)
- Maria Bamford - Polly (voice)
- Maria Bamford - The Royal Mush (voice)
- Maria Bamford - Puffer Fish (voice)
- Maria Bamford - Foghorn (voice)
- Maria Bamford - Toothpaste (voice)
- Lolly Adefope - Snowflake (voice)
- Danny Pudi - Cookiesmell (voice)
- Bob Balaban - Gerald (voice)
- Richard Masur - The Broom Maker (voice)
- Doug Benson - Bassoon (voice)
- Doug Benson - Bassoon / Additional Voices (voice)
- Dee Bradley Baker - Stair Rabbit (voice)
- Niki Yang - Heather D / Rosie (voice)
- Niki Yang - Heather D (voice)
- Niki Yang - Egg (voice)
- Niki Yang - Shortcake (voice)
- Niki Yang - Additional Voices (voice)
- Niki Yang - Batilda (voice)
- Aimee Mann - Siren (voice)
- Lauren Lapkus - Olf (voice)
- Kate Berlant - Striped Horse (voice)
- John Early - Bearded Sheep (voice)
- Julian Edwards - Pepper (voice)
- Julian Edwards - Pepper / Additional Voices (voice)
- Julian Edwards - Additional Voices (voice)
- Xavier Patterson - Ghost the Boy (voice)
- Aparna Nancherla - Opie / Agatha (voice)
- Aparna Nancherla - Opie (voice)
- Aparna Nancherla - Opie / Additional Voices (voice)
- Aparna Nancherla - Oddjobs (voice)
- Aparna Nancherla - Additional Voices (voice)
- Sunita Mani - Lucyola (voice)
- Sunita Mani - Additional Voices (voice)
- Ashley Jensen - Miss Mary (voice)
- Jeremy Crutchley - Additional Voices (voice)
- Jeremy Crutchley - Theo (voice)
- Jeremy Crutchley - Frog Musician (voice)
- Toks Olagundoye - Additional Voices (voice)
- Chris Fleming - Professor Q (voice)
- Julian Barratt - Poppawoppa (voice)
- Julian Barratt - Sandwich Monk (voice)
- Kate Dickie - Professor Elliot (voice)
- Stefan Johnson - Moon (voice)
- Stefan Johnson - Additional Voices (voice)
- Vanessa Lee Chester - Nancy (voice)
- Vanessa Lee Chester - Nancy / Minituni (voice)
- Iris Bahr - Mother Mouse (voice)
- Tony Curran - Ryan (voice)
- Mathieu Szymkowiak - Papa Mouse (voice)
- Lauren Mei - Additional Voices (voice)
- Lauren Mei - Kid Mouse 2 (voice)
- Shirley Henderson - Mum (voice)
- Shirley Henderson - Additional Voices (voice)
- Mia Lynn Bangunan - Baklava (voice)
- Mia Lynn Bangunan - Kid Mouse 1 (voice)
- LaTanya Richardson Jackson - Queen Bee (voice)
- Yara Shahidi - Beanie (voice)
- Mykal-Michelle Harris - Lem (voice)
- Mykal-Michelle Harris - Lem / Additional Voices (voice)
- Momona Tamada - Bethie (voice)
- Alex Lawther - Mildred's Friend / Additional Voices (voice)
- Alex Lawther - Mildred's Friend (voice)
- Sacha Dhawan - Miracle Rabbit (voice)
- Quinn Minichino Eakins - Moonbeam (voice)
- Sarah Lloyd - Sarah (voice)
- Dylan Alvarado - King (voice)
- Dylan Alvarado - Frog Prince (voice)
- Isla Ashworth - Young Mildred (voice)
- Laura Dickinson - Additional Voices (voice)
- Joanna Lumley - Adult Susie (voice)
- Ian Chen - Pale Dog (voice)
- Seo Kim - Additional Voices (voice)
- Sarah Lloyd
- Susan Varghese
- Cole Sanchez
- Rob Sorcher
- Meghan Bradley
- Kristi Reed
- Julia Pott
- Seo Kim
- Mark Mothersbaugh
- Krandal Crews
- Bill Devine
- Stacy Renfroe
- Albert Fox
Shirley Henderson interpreta a Additional Voices (voice) en la serie.
Kathleen Turner hace el papel de Mole Judge (voice).
Frances Conroy interpreta a Lead Patrol Elf (voice) en la serie.
Whoopi Goldberg hace el papel de Barb (voice).
Elijah Wood hace el papel de Saxophone (voice).
Alfred Molina hace el papel de Andy (voice).
Aimee Mann interpreta a Siren (voice) en la serie.
Tony Curran interpreta a Ryan (voice) en la serie.
Oona Laurence interpreta a Hedgehog (voice) en la serie.
Antonio Raul Corbo hace el papel de Oscar (voice).
Capítulo disponible en las siguientes plataformas:
