Oona Laurence
Hedgehog (voice) (12 eps)
Julia Pott
Susie (voice) (12 eps)
Antonio Raul Corbo
Oscar (voice) (12 eps)
Indie Nameth
Lucy (voice) (6 eps)
Naomi Hansen
Additional Voices (voice) (6 eps)
Bobby Moynihan
Dennis (voice) (5 eps)
Sam Lavagnino
King (voice) (4 eps)
Lesley Nicol
Ramona / Emma (voice) (4 eps)
Max Mitchell
Prophecy Alien (voice) (4 eps)
Elijah Wood
Saxophone (voice) (3 eps)
Ethan Maher
Puddle (voice) (3 eps)
Jo Firestone
Mallory (voice) (3 eps)
Jason Maybaum
Fife (voice) (3 eps)
Charlyne Yi
Alice (voice) (2 eps)
Nikki Castillo
Betsy (voice) (2 eps)
Whoopi Goldberg
Barb (voice) (2 eps)
Isobel Chinnery
Ramona Age 8 (voice) (2 eps)
Shen Yao
Additional Voices (voice) (2 eps)
Niki Yang
Shortcake (voice) (2 eps)
Cole Sanchez
Salt Parasite (voice) (2 eps)
Doug Benson
Bassoon (voice) (2 eps)
Frances Conroy
Ms. Clearinet (voice) (2 eps)
Fortune Feimster
Additional Voices (voice) (1 eps)
Betsy Sodaro
Skadi (voice) (1 eps)
Stephen Root
Stuart (voice) (1 eps)
Melissa Villaseñor
Psychic (voice) (1 eps)
Bella Ramsey
Ramona Age 15 (voice) (1 eps)
Remy Edgerly
Noodle (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)
Kevin Michael Richardson
Yeti Elder (voice) (1 eps)
Ashly Burch
Additional Voices (voice) (1 eps)
Audrey Wasilewski
Yeti Nurse (voice) (1 eps)
Roz Ryan
Elder (voice) (1 eps)
Kate Micucci
Accordion (voice) (1 eps)
Keith David
Lithophone (voice) (1 eps)