Ivy
Misha Vilyenkov
Ignacio
Dr. Reingold
Adult Marie Alweather
Benny / Paulie (voice)
Artie
Marie Alweather
Warren Alweather
Virgil the Janitor
Ruby / Lupe (voice)
Lila Alweather
Graduate Student #1
Graduate Student #2
Grandpa
Speech Therapist
Shirley
Gerald
Jeremy
Research Assistant #1
Research Assistant #2
Veterinarian
Molly
Mr. Tauper
Ivy's Doctor
Cantina Singer