Oscar

Elliott Smith

Hedgehog

Oona Laurence

Susie (voice)

Julia Pott

Pepper

Sam Lavagnino

Lucy (voice)

Indie Nameth

Alice (voice)

Charlyne Yi

Max (voice)

Ramone Hamilton

Oscar (voice) / Baby Dylan (Alice) (voice)

Antonio Raul Corbo

Additional Voices

Jeremy Crutchley

Jimjams (voice) / Mortimer (voice) / Mortimer

Bobby Moynihan

Mildred

Faye Larkin

Additional Voices (voice) / Puddle (voice) / Boyband (voice)

Ethan Maher

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

Fortune Feimster

Pajamas (voice) / Additional Voices (voice)

Naomi Hansen

Oscar (voice)

Asher Bishop

Betsy (voice) / Betsy / Sarah (voice)

Nikki Castillo

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

Andre Robinson

Alexa (voice)

Alexa Nisenson

Additional Voices (voice) / Ghost Dad Cole (voice) / Alligator Chef (voice)

Cole Sanchez

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

Alia Shawkat

Howard (voice)

Mike Birbiglia

Margot (voice) / Additional Voices (voice) / Margot

Kimiko Glenn

Additional Voices (voice) / Chet (voice) / Ghost Dad Kent (voice)

Kent Osborne

Ramona (voice) / Ramona / Emma (voice)

Lesley Nicol

Barb (voice)

Whoopi Goldberg

Moon (voice) / Additional Voices (voice)

Cedric the Entertainer

Andy (voice) / Additional Voices (voice) / Monster Under the Bed (voice)

Alfred Molina

Additional Voices (voice) / Langston / Waylon (voice)

Kevin Michael Richardson

Additional Voices (voice) / Tammy (voice) / Tammy

Roz Ryan

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

Richard Kind

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

Kathleen Wilhoite

Additional Voices (voice) / Alien (voice)

Rylee Alazraqui

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

Stephen Root

Mallory (voice)

Jo Firestone

Sandy (voice) / Toothpaste (voice) / Puffer Fish (voice)

Maria Bamford

Saxophone (voice)

Elijah Wood

Additional Voices (voice) / Basketball (voice)

Luke Lowe

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

Max Mitchell

Director

Niki Yang