Anna Cathcart

Olympia

Isaac Kragten

Otis

Millie Davis

Ms. O

Olivia Presti

Oona

Christian Distefano

Owen

Alexander Fonseca

Chuck Shmumbers

Elena Juatco

Hiccups Lady

Amy Khou

Odena

Joshua Kilimnik

Odd Todd

Parker Lauzon

Trumpet Agent

Tristan Ly

Osmand

Tony Sciara

Gino Confalone

Chris River

Dramatic Kid Announcer (as Christopher River)

Tate Yap

O'Donahue

Kaitlyn Yu

Patternista / 80's Ms. O