Dagmara Dominczyk as Zelma (voice)

Michele Pawk as Biology (voice)

Matthew Modine as Bo (voice)

Cameron Monaghan as Sergei (voice)

Stephen Lang as Jonas (voice)

Erica D. Schroeder as Elita (voice)

Emma Kenney as Sarma (voice)

Anna O'Donoghue as Teacher #1 (voice)

Tanya Franks as Teacher #2 (voice)

Clyde Baldo as Eduards (voice)

Najla Said as New Girl (voice)

Keith Randolph Smith as Man on Train (voice)

Dan Domingues as Lauris (voice)

Florencia Lozano as Zelma's Mother (voice)

Ruby Modine as Nina (voice)

Carolyn Baeumler as Darya (voice)

Christina Pumariega as Darya's Mother (voice)

Tracy Thorne as Master of Ceremonies #1 (voice)

Laila Robins as Master of Ceremonies #2 (voice)

Cindy Cheung as Velta (voice)

Dale Soules as Official (voice)

Jennifer Dorr White as Pastor (voice)

Brian Dykstra as Estonian #1 (voice)

Andrew Garman as Estonian #2 (voice)

Michael Laurence as Big Man (voice)

Sturgis Warner as Big Man's Friend (voice)

Ieva Katkovska as Mythology Siren #2 (voice)

Kristine Pastare as Mythology Siren #3 (voice)

Iluta Alsberga as Mythology Siren #1 (voice)

Madara Botmane as (voice)

Zane Daudziņa as (voice)

Dainis Grūbe as (voice)

Juris Kalniņš as (voice)

Ģirts Ķesteris as (voice)

Storm Large as (voice)

Katrīne Pasternaka as (voice)

Regīna Razuma as (voice)

Edgars Samītis as (voice)

Guna Zariņa as (voice)

Kaspars Znotiņš as (voice)