Julia Pott
Susie (voice) (120 eps)
Oona Laurence
Hedgehog (voice) (107 eps)
Indie Nameth
Lucy (voice) (62 eps)
Charlyne Yi
Alice (voice) (53 eps)
Ramone Hamilton
Max (voice) (52 eps)
Antonio Raul Corbo
Oscar (voice) (51 eps)
Bobby Moynihan
Jimjams (voice) (47 eps)
Elliott Smith
Oscar (voice) (40 eps)
Sam Lavagnino
Pepper (voice) (35 eps)
Ethan Maher
Additional Voices (voice) (30 eps)
Fortune Feimster
Ava (voice) (29 eps)
Naomi Hansen
Pajamas (voice) (26 eps)
Nikki Castillo
Betsy (voice) (25 eps)
Asher Bishop
Oscar (voice) (21 eps)
Alexa Nisenson
Alexa (voice) (21 eps)
Andre Robinson
Oliver (voice) (21 eps)
Lesley Nicol
Ramona (voice) (20 eps)
Mike Birbiglia
Howard (voice) (17 eps)
Cole Sanchez
Additional Voices (voice) (17 eps)
Alia Shawkat
Blanche (voice) (16 eps)
Whoopi Goldberg
Barb (voice) (16 eps)
Kimiko Glenn
Margot (voice) (15 eps)
Kent Osborne
Additional Voices (voice) (14 eps)
Faye Larkin
Mildred (voice) (13 eps)
Alfred Molina
Andy (voice) (12 eps)
Kathleen Wilhoite
Sue (voice) (12 eps)
Julian Edwards
Pepper (voice) (12 eps)
Cedric the Entertainer
Moon (voice) (11 eps)
Jo Firestone
Mallory (voice) (11 eps)
Kevin Michael Richardson
Additional Voices (voice) (11 eps)
Roz Ryan
Additional Voices (voice) (10 eps)
Aparna Nancherla
Opie / Agatha (voice) (9 eps)
Stephen Root
Stuart (voice) (8 eps)
Richard Kind
Shark (voice) (7 eps)
Rylee Alazraqui
Additional Voices (voice) (7 eps)
Maria Bamford
Sandy (voice) (7 eps)
Niki Yang
Heather D / Rosie (voice) (7 eps)
Elijah Wood
Saxophone (voice) (6 eps)
Max Mitchell
Prophecy Alien (voice) (6 eps)
Mykal-Michelle Harris
Lem (voice) (6 eps)
Luke Lowe
Additional Voices (voice) (5 eps)
Keith Ferguson
Additional Voices (voice) (5 eps)
Laraine Newman
Hedgehog's Mom (voice) (5 eps)
Jeremy Crutchley
Additional Voices (voice) (5 eps)
Melanie Lynskey
Sun (voice) (4 eps)
Daphne Thomas
Lem (voice) (4 eps)
Paula Poundstone
Paulette (voice) (4 eps)
Gaille Heidemann
Additional Voices (voice) (4 eps)
Doug Benson
Bassoon (voice) (4 eps)
Xavier Patterson
Ghost the Boy (voice) (4 eps)
Scarlett Rose
Additional Voices (voice) (4 eps)
Toks Olagundoye
Additional Voices (voice) (4 eps)
Julian Barratt
Poppawoppa (voice) (4 eps)
Stefan Johnson
Moon (voice) (4 eps)
Vanessa Lee Chester
Nancy (voice) (4 eps)
Shirley Henderson
Mum (voice) (4 eps)
Betsy Sodaro
Skadi (voice) (3 eps)
Wallace Shawn
Pete (voice) (3 eps)
Sally Struthers
Rose (voice) (3 eps)
Jason Maybaum
Fife (voice) (3 eps)
Frances Conroy
Ms. Clearinet (voice) (3 eps)
Remy Edgerly
Mystical Alien (voice) (3 eps)
Kate Berlant
Striped Horse (voice) (3 eps)
John Early
Bearded Sheep (voice) (3 eps)
Sunita Mani
Lucyola (voice) (3 eps)
Ashley Jensen
Miss Mary (voice) (3 eps)
Alex Lawther
Mildred's Friend / Additional Voices (voice) (3 eps)
Dylan Alvarado
King (voice) (3 eps)
Issac Ryan Brown
Max (voice) (2 eps)
Maggie Lowe
Additional Voices (voice) (2 eps)
Daniel Hagen
Additional Voices (voice) (2 eps)
Eric Bauza
Additional Voices (voice) (2 eps)
Dexter Hobert
Additional Voices (voice) (2 eps)
Mattea Quin
Lem (voice) (2 eps)
Kate Flannery
Georgina (voice) (2 eps)
Don Lake
Doc Hogsbottom (voice) (2 eps)
Isobel Chinnery
Ramona Age 8 (voice) (2 eps)
Shen Yao
Additional Voices (voice) (2 eps)
Kate Micucci
Accordion (voice) (2 eps)
Fred Melamed
Monk Receptionist (voice) (2 eps)
Audrey Wasilewski
Yeti Nurse (voice) (2 eps)
Keith David
Lithophone (voice) (2 eps)
Lauren Lapkus
Olf (voice) (2 eps)
Lauren Mei
Kid Mouse 2 (voice) (2 eps)
Mia Lynn Bangunan
Baklava (voice) (2 eps)
Quinn Minichino Eakins
Moonbeam (voice) (2 eps)
Sarah Lloyd
Sarah (voice) (2 eps)
Georgie Glenn
Adult Mildred (voice) (2 eps)
Joanna Lumley
Adult Susie (voice) (2 eps)
Ian Chen
Pale Dog (voice) (2 eps)
Keith Szarabajka
Additional Voices (voice) (1 eps)
Brycen Taylor Hall
Additional Voices (voice) (1 eps)
O'Neill Monahan
Additional Voices (voice) (1 eps)
Cooper Yarovinsky
Additional Voices (voice) (1 eps)
Caleb McLaughlin
Ghost (voice) (1 eps)
Nat Faxon
Popular Banana Split (voice) (1 eps)
Tyler Williams
Additional Voices (voice) (1 eps)
Brenda Vaccaro
Godmonster (voice) (1 eps)
Lorraine Bracco
Werewolf Queen (voice) (1 eps)
Juju Journey Brener
Additional Voices (voice) (1 eps)
Brian Baumgartner
Storm Cloud (voice) (1 eps)
Bobcat Goldthwait
Monk Voice (voice) (1 eps)
Lori Petty
Ms. Pinch (voice) (1 eps)
Garrett Davis
Toothpaste (voice) (1 eps)
Jane Lynch
Skadi's Mom (voice) (1 eps)
Rachel Dratch
Bernadette (voice) (1 eps)
Carol Kane
Barb Jr. (voice) (1 eps)
Wanda Sykes
Ethel (voice) (1 eps)
John Hodgman
Bartholomole (voice) (1 eps)
Kathleen Turner
Mole Judge (voice) (1 eps)
Justin Felbinger
Dungeon Doug (voice) (1 eps)
Jack Stanton
Additional Voices (voice) (1 eps)
Cooper J. Friedman
Caboodle (voice) (1 eps)
Steve Berg
Harry (voice) (1 eps)
Melissa Villaseñor
Psychic (voice) (1 eps)
Bella Ramsey
Ramona Age 15 (voice) (1 eps)
Lucian Perez
Glazed Ham (voice) (1 eps)
Austen Alazraqui
Additional Voices (voice) (1 eps)
Hudson Cordero
Additional Voices (voice) (1 eps)
Henry Holcomb
Additional Voices (voice) (1 eps)
Ashly Burch
Additional Voices (voice) (1 eps)
Loretta Devine
Sea Cow (voice) (1 eps)
Cole Escola
Sea Slug (voice) (1 eps)
Elsie Fisher
Sea Snail (voice) (1 eps)
Scott Hoying
Blobfish (voice) (1 eps)
Eva Victor
Sea Susie (voice) (1 eps)
Archie Engelhardt
Additional Voices (voice) (1 eps)
Julian Glander
Additional Voices (voice) (1 eps)
Olivia Kidder
Additional Voices (voice) (1 eps)
Gina Randle
Additional Voices (voice) (1 eps)
Travis McElroy
Cutie (voice) (1 eps)
Fred Stoller
Ghost the Earnest (voice) (1 eps)
Lorraine Toussaint
Emily Ghost (voice) (1 eps)
Lolly Adefope
Snowflake (voice) (1 eps)
Danny Pudi
Cookiesmell (voice) (1 eps)
Lola Valentina Keaton
Additional Voices (voice) (1 eps)
Bob Balaban
Gerald (voice) (1 eps)
Richard Masur
The Broom Maker (voice) (1 eps)
Dee Bradley Baker
Stair Rabbit (voice) (1 eps)
Aimee Mann
Siren (voice) (1 eps)
Thomas Herpich
Carl (voice) (1 eps)
Poppy DeAbaitua
Young Susie (voice) (1 eps)
Alice Pott
New Susie (voice) (1 eps)
Chris Fleming
Professor Q (voice) (1 eps)
Kate Dickie
Professor Elliot (voice) (1 eps)
Iris Bahr
Mother Mouse (voice) (1 eps)
Tony Curran
Ryan (voice) (1 eps)
Mathieu Szymkowiak
Papa Mouse (voice) (1 eps)
LaTanya Richardson Jackson
Queen Bee (voice) (1 eps)
Yara Shahidi
Beanie (voice) (1 eps)
Momona Tamada
Bethie (voice) (1 eps)
Sacha Dhawan
Miracle Rabbit (voice) (1 eps)
Isla Ashworth
Young Mildred (voice) (1 eps)
Joshua Das
Additional Voices (voice) (1 eps)
Laura Dickinson
Additional Voices (voice) (1 eps)
Daniel Dunlap
Additional Voices (voice) (1 eps)
Seo Kim
Additional Voices (voice) (1 eps)