Mel Rodriguez

as

Finn Wolfhard

as

Casey Wilson

as

Adam Devine

as

Jessica Williams

as

Robert Redford

as Lokia the Dolphin Monster (voice)

Luther Campbell

as

Amy Seimetz

as

Doug Lussenhop

as

Jon Glaser

as

Saul Williams

as

Eliezer Castro

as Boat Dad

Luther Campbell Jr.

as

Omar Caraballo

as Police Officer

Wayne LeGette

as Walter Price

River Butcher

as

Rafael Castillo

as Bad Rick Ross

Karel Curras

as Yuri

Cameron Esposito

as

Michelle feliciano

as Sandra

Jason David Frank

as

Heinley Gaspard

as Rick Ross

Steve Gladstone

as Richard

Mia Gonzalez

as Sarah

Jaidi Marrero

as The Creature

Daneel McDonald

as Bad Rick Ross

Tallie Medel

as

Phillip Mullings Jr.

as Security Guard

Yaxeni Oriquen

as

Adam Pally

as Uncle Matt

Sharon Parra

as Petra Alvarez

Ross Partridge

as

Dylan Redford

as

Danielle Schneider

as

Or Schraiber

as

Sophia Takal

as

Daniel Gilchrist

as Lokia