Millie Davis

Ms. O

Dalila Bela

Agent Olive

Isaac Kragten

Otis

Christian Distefano

Owen

Filip Geljo

Agent Otto

Anna Cathcart

Agent Olympia

Sean Michael Kyer

Agent Oscar

Eshaan Buadwal

Olaf

Olivia Presti

Oona

Asha Soetan

Agent Orli / Orby

Eric Toth

Gerrard

Tomaso Sanelli

Agent Ogg

Raphael Alejandro

Agent in Band (uncredited)

Drew Haytaoglu

Ozric

Jaiden Cannatelli

Olhm

Percy Hynes White

Odie

Miguel Anthony

Tony

Alexander Elliot

Agent O'Que

Ellery Miki-Petite

Arctic Mr. O

Kyle Meagher

Not The Real Big O

Jacob Soley

Osmond

Sarah Abbott

Yucks

Logan Aultman

Seattle Creature Agent

Fodé Bangoura

Dad

Aaron Eves

High Five

Tyler Malazo

Evil Newsboy

Thom Allison

Chef

Martin Roach

Fladam

Kyle Gatehouse

Monsieur Papier-Maché

Sharron Matthews

Chef Sylvia

Kevin Hanchard

Dry Cleaner Guy

Jameson Kraemer

King Pin Mike

Mercedes Morris

Corn Flakes

Jaeden Noel

Agent Obfusco

Ann Pirvu

Evil Queen

Ana Araújo

Chief of Graph

Amrit Kaur

Annette

Ella Bernstein

OSIP

Ava Arrindell

New York Ms. O

Krista Patton

Mail Carrier

Brendan Halloran

News Anchor

Matt Folliott

William Ocean

Annie Chen

Clockhead Lady

Ci Hang Ma

Reporter #1

Kevin McDonald

Lord Rectangle

Mark McKinney

General Pentagon

Scott Thompson

Professor Square

Marcia Bennett

Circle Lady

Christy Bruce

Miss Triangle

Robert Fulton

Military Man

Carly Heffernan

Maid

Brian T. Stevenson

Oakley

Connor Thompson

Butler

Kyle Breitkopf

O'Brien

Paul Constable

Cupcake Guy

Alina Prijono

Ophelia

Darryl Hinds

Coach Roberts

Andy Hall

Super Fan Larrry

Elena Juatco

Hiccup Lady

Erin Keaney

Woman with Cello

Megan Leach

Jenny Smith

T.J. McGibbon

Mathroom (voice)

Alex Spencer

Jasper Joyner

Landon Rowan

Baby Orson

Logan Rowan

Baby Orson

Mark De Angelis

Announcer (voice)

Nicole Stamp

Super Fan Phyllis

Bryan Stevenson

Oakley

Thomas Alderson

Tony D

Aisha Alfa

Town Baker

Matthew Armet

Johnny J

Paul Bates

Dougnut Baker

Jason Blicker

Frank

Ashley Botting

Debbie

Aurora Browne

Upset Woman

Cassius Crieghtney

Donny

Stephan Dickson

Ringo

Emma Fleury

Rosewood Ave Woman

Ali Hassan

Delivery Doug

Reid Janisse

Upset Man

Ava Cheung

Dr. O.

Jordan Johnson-Hinds

Ronny

Kathleen Phillips

Circle Sue

Kris Siddiqi

Upset Man #2

Nadine Bhabha

Tessa Twosie

Rei Yamauchi Fulker

Agent Ocomotive

Rhoslynne Bugay

Doctor