Theo James as Hal / Bill

Tatiana Maslany as Lois

Christian Convery as Young Hal / Young Bill

Colin O'Brien as Petey

Adam Scott as Captain Petey Shelborn

Elijah Wood as Ted

Rohan Campbell as Thrasher / Ricky

Sarah Levy as Aunt Ida

Osgood Perkins as Uncle Chip

Nicco Del Rio as Rookie Priest

Zia Newton as Dwayne

Kingston Chan as Lt. Pepper

Laura Mennell as Petey's Mom

Corin Clark as Diving Woman

Tess Degenstein as Barbara

Beatrix Perkins as Florence

Danica Dreyer as Babysitter Annie

Dianne Greenwood as Ticketed Cop (uncredited)

Shafin Karim as Pawn Shop Owner

Lumen Beltran as Police Officer

Janet Kidder as Thrasher's Mom

Paul Puzzella as Thrasher's Dad

Jeremy Cox as Beauchamps

Jason Burkart as Lawnmower Neighbor

Katie Stuart as Nancy Rizzoli

Michael Anthony Sallegue Samosa as Hibachi Chef

Trey Helten as Business Man

Eve Exner as Monkey Man

Danny Virtue as Pale Rider

Joyce Robbins as Neighbor Lady 1

Jacqueline Robbins as Neighbor Lady 2

Tina Pi as Supermarket Patron

Doralynn Mui as Gas Station Mom

Scott Nicholson as Burt Burgerson

Charles Chi Soo Kim as Mourner in Church (uncredited)