The Monkey

Theo James

Hal / Bill

Tatiana Maslany

Lois

Christian Convery

Young Hal / Young Bill

Colin O'Brien

Petey

Adam Scott

Captain Petey Shelborn

Elijah Wood

Ted

Rohan Campbell

Thrasher / Ricky

Sarah Levy

Aunt Ida

Osgood Perkins

Uncle Chip

Nicco Del Rio

Rookie Priest

Zia Newton

Dwayne

Kingston Chan

Lt. Pepper

Laura Mennell

Petey's Mom

Corin Clark

Diving Woman

Tess Degenstein

Barbara

Beatrix Perkins

Florence

Danica Dreyer

Babysitter Annie

Dianne Greenwood

Ticketed Cop (uncredited)

Shafin Karim

Pawn Shop Owner

Lumen Beltran

Police Officer

Janet Kidder

Thrasher's Mom

Paul Puzzella

Thrasher's Dad

Jeremy Cox

Beauchamps

Jason Burkart

Lawnmower Neighbor

Katie Stuart

Nancy Rizzoli

Michael Anthony Sallegue Samosa

Hibachi Chef

Trey Helten

Business Man

Eve Exner

Monkey Man

Danny Virtue

Pale Rider

Joyce Robbins

Neighbor Lady 1

Jacqueline Robbins

Neighbor Lady 2

Tina Pi

Supermarket Patron

Doralynn Mui

Gas Station Mom

Scott Nicholson

Burt Burgerson

Charles Chi Soo Kim

Mourner in Church (uncredited)