Summer Camp Island

Julia Pott

Susie (voice)

Elliott Smith

Oscar (voice)

Oona Laurence

Hedgehog (voice)

Indie Nameth

Lucy (voice)

Ramone Hamilton

Max (voice)

Charlyne Yi

Alice (voice)

Naomi Hansen

Pajamas (voice)

Antonio Raul Garcia

Oscar (voice)

Asher Bishop

Oscar (voice)

Sam Lavagnino

Pepper (voice)

Bobby Moynihan

Additional Voices (voice) / Dennis (voice) / Jimjams (voice) / Melvin (voice) / Mortimer (voice) / Mortimer / Melvin (voice) / Mortimer / Melvin / Jimjams (voice) / Old Log Ghost (voice) / Toad Doctor / Jimjams (voice) / Tub (voice)

Ethan Maher

Additional Voices (voice) / Boyband (voice) / Dream Boy (Susie) (voice) / Puddle (voice)

Fortune Feimster

Additional Voices (voice) / Ava (voice) / Dolly (voice) / Mrs. Goose (voice) / Vern / Dolly (voice)

Nikki Castillo

Betsy (voice) / Betsy / Sarah (voice)

Andre Robinson

Additional Voices (voice) / Decent Boi (Hedgehog) (voice) / Oliver (voice)

Cole Sanchez

Additional Voices (voice) / Alligator 1 (voice) / Alligator Chef (voice) / Freddie (voice) / Frog King (voice) / Ghost Dad #2 (voice) / Ghost Dad Cole (voice) / Salt Parasite (voice) / Vann (voice) / Yeti Orderly (voice)

Alexa Nisenson

Alexa (voice)

Alia Shawkat

Blanche (voice) / Butter Goth (voice) / Cinnamon Raisin Toast (voice)

Mike Birbiglia

Howard (voice)

Kimiko Glenn

Additional Voices (voice) / Margot (voice) / Margot / Ski Bat (voice)

Kent Osborne

Additional Voices (voice) / Alligator Chef (voice) / Chet (voice) / Ghost Dad #1 (voice) / Ghost Dad Kent (voice)

Lesley Nicol

Ramona (voice) / Ramona / Emma (voice)

Whoopi Goldberg

Barb (voice)

Cedric the Entertainer

Additional Voices (voice) / Moon (voice)

Alfred Molina

Additional Voices (voice) / Andy (voice) / Monster Under the Bed (voice) / Monster Under the Bed / Oscar's Dad (voice)

Kevin Michael Richardson

Additional Voices (voice) / Auctioneer (voice) / Langston / Waylon (voice) / Professor (voice) / Toast Ghost (voice) / Waylon (voice) / Yeti Elder (voice)

Roz Ryan

Additional Voices (voice) / Elder (voice) / Patrice (voice) / Tammy (voice) / Tammy / Patrice (voice) / The Death Cap (voice)

Richard Kind

Additional Voices (voice) / Hedgehog's Dad (voice) / Shark (voice)

Kathleen Wilhoite

Oscar's Mom (voice) / Sue (voice)

Rylee Alazraqui

Additional Voices (voice) / Alien (voice)

Stephen Root

Additional Voices (voice) / Prime Monister (voice) / Stuart (voice)

Jo Firestone

Mallory (voice)

Maria Bamford

Foghorn (voice) / Polly (voice) / Puffer Fish (voice) / Sandy (voice) / The Royal Mush (voice) / Toothpaste (voice)

Elijah Wood

Saxophone (voice)

Luke Lowe

Additional Voices (voice) / Basketball (voice)

Max Mitchell

Additional Voices (voice) / Jeremiah (voice) / Patootie (voice) / Prophecy Alien (voice)

Daphne Thomas

Lem (voice)

Paula Poundstone

Paulette (voice)

Gaille Heidemann

Additional Voices (voice) / Helen (voice)

Aparna Nancherla

Additional Voices (voice) / Oddjobs (voice) / Opie (voice)

Jeremy Crutchley

Additional Voices (voice) / Frog Musician (voice) / Theo (voice)

Melanie Lynskey

Sun (voice)

Betsy Sodaro

Skadi (voice)

Laraine Newman

Hedgehog's Mom (voice)

Sally Struthers

Additional Voices (voice) / Rose (voice)

Niki Yang

Additional Voices (voice) / Egg (voice) / Shortcake (voice)

Wallace Shawn

Barry (voice) / Morris Mole (voice) / Pete (voice)

Keith Ferguson

Additional Voices (voice) / FM Dog (voice) / Ghost Pendarvis (voice)

Jason Maybaum

Fife (voice)

Frances Conroy

Lead Patrol Elf (voice) / Ms. Clearinet (voice)

Julian Edwards

Additional Voices (voice) / Pepper (voice)

Xavier Patterson

Ghost the Boy (voice)

Scarlett Rose

Additional Voices (voice)

Ashley Jensen

Miss Mary (voice)

Faye Larkin

Mildred (voice)

Issac Ryan Brown

Max (voice)

Maggie Lowe

Additional Voices (voice)

Daniel Hagen

Additional Voices (voice)

Eric Bauza

Additional Voices (voice)

Dexter Hobert

Additional Voices (voice)

Mattea Quin

Lem (voice)

Kate Flannery

Georgina (voice)

Don Lake

Additional Voices (voice) / Doc Hogsbottom (voice)

Remy Edgerly

Mystical Alien (voice) / Noodle (voice)

Isobel Chinnery

Ramona Age 8 (voice)

Shen Yao

Additional Voices (voice)

Audrey Wasilewski

Red Haired Moom (voice) / Yeti Nurse (voice)

Doug Benson

Bassoon (voice)

Kate Micucci

Accordion (voice) / Additional Voices (voice)

Keith David

Lithophone (voice) / Tummy (voice)

Lauren Lapkus

Olf (voice)

Julian Barratt

Poppawoppa (voice)

Shirley Henderson

Mum (voice)

Toks Olagundoye

Additional Voices (voice)

Keith Szarabajka

Additional Voices (voice)

Brycen Taylor Hall

Additional Voices (voice)

O'Neill Monahan

Additional Voices (voice)

Cooper Yarovinsky

Additional Voices (voice)

Caleb McLaughlin

Ghost (voice)

Nat Faxon

Popular Banana Split (voice)

Tyler Williams

Additional Voices (voice)

Brenda Vaccaro

Godmonster (voice)

Lorraine Bracco

Werewolf Queen (voice)

Juju Journey Brener

Additional Voices (voice)

Brian Baumgartner

Storm Cloud (voice)

Bobcat Goldthwait

Monk Voice (voice)

Fred Melamed

Monk Receptionist (voice)

Lori Petty

Ms. Pinch (voice)

Garrett Davis

Toothpaste (voice)

Jane Lynch

Skadi's Mom (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)

Jack Stanton

Additional Voices (voice)

Cooper J. Friedman

Caboodle (voice)

Steve Berg

Harry (voice)

Melissa Villaseñor

Psychic (voice)

Bella Ramsey

Ramona Age 15 (voice)

Lucian Perez

Glazed Ham (voice)

Austen Alazraqui

Additional Voices (voice)

Hudson Cordero

Additional Voices (voice)

Henry Holcomb

Additional Voices (voice)

Ashly Burch

Additional Voices (voice)

Loretta Devine

Sea Cow (voice)

Cole Escola

Sea Slug (voice)

Elsie Fisher

Sea Snail (voice)

Scott Hoying

Blobfish (voice)

Eva Victor

Sea Susie (voice)

Archie Engelhardt

Additional Voices (voice)

Julian Glander

Additional Voices (voice)

Olivia Kidder

Additional Voices (voice)

Gina Randle

Additional Voices (voice)

Sunita Mani

Additional Voices (voice)

Travis McElroy

Cutie (voice)

Fred Stoller

Ghost the Earnest (voice)

Lorraine Toussaint

Emily Ghost (voice)

Lolly Adefope

Snowflake (voice)

Danny Pudi

Cookiesmell (voice)

Lola Valentina Keaton

Additional Voices (voice)

Bob Balaban

Gerald (voice)

Richard Masur

The Broom Maker (voice)

Dee Bradley Baker

Stair Rabbit (voice)

Aimee Mann

Siren (voice)

Thomas Herpich

Carl (voice)

Kate Berlant

Striped Horse (voice)

John Early

Bearded Sheep (voice)

Stefan Johnson

Additional Voices (voice)

Vanessa Lee Chester

Nancy (voice)

Poppy DeAbaitua

Young Susie (voice)

Alex Lawther

Mildred's Friend (voice)

Alice Pott

New Susie (voice)

Chris Fleming

Professor Q (voice)

Kate Dickie

Professor Elliot (voice)

Iris Bahr

Mother Mouse (voice)

Mia Lynn Bangunan

Kid Mouse 1 (voice)

Tony Curran

Ryan (voice)

Lauren Mei

Kid Mouse 2 (voice)

Mathieu Szymkowiak

Papa Mouse (voice)

Mykal-Michelle Harris

Lem (voice)