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

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)