Marlow Barkley as Nemo

Jason Momoa as Flip the Creature

Chris O'Dowd as Phillip

Kyle Chandler as Peter

Weruche Opia as Agent Green

India de Beaufort as Ms. Arya

Humberly González as Graciela

Cameron Nicoll as Young Philip

Antonio Raine Pastore as Young Peter

Chris D'Silva as Jamal

Yanna McIntosh as Carla

Jacob So as Emmett

Izaak Smith as Canadian Guy

Michael Blake as Accountant

Irene Barriault as Coastguardsman #1

Jana Lorbetski as Coastguardsman #2

Leslie Adlam as Agent Brown

Owais Sheikh as Frank

Sergio Osuna as Manager

Ken Hall as Baby (Motion Capture)

Kassian Pascal as Baby

Leo Lorenzo Jones as Baby

Yosvani Castañeda as Bandleader

Ava Cheung as Ho-sook

Jamillah Ross as Agent Orange

Tonya Cornelisse as Agent Red

Luxton Handspiker as Matt

Neville Edwards as Pastor

Andre Sills as Pilot