Maxim Gaudette as The Assassin

Sébastien Huberdeau as Jean-François

Karine Vanasse as Valérie

Evelyne Brochu as Stéphanie

Martin Watier as Jean-François (voice)

Johanne-Marie Tremblay as Jean-François' Mother

Natalie Hamel-Roy as Jean-François' Mother (voice)

Pierre-Yves Cardinal as Éric

Pierre Leblanc as Mr. Martineau

Francesca Barcenas as Injured Student at Copier

Ève Duranceau as Student with the Ear Injury

Mathieu Ledoux as Injured Student

Adam Kosh as Killer's Roommate

Larissa Corriveau as Killer's Neighboor

Manon Lapointe as Killer's Mother

Kim Lavack-Paquin as Student at the Library

Mireille Brullemans as Admission Office's Secretary

Pier-Olivier Paquet as Student at the Admission Office

Louise Proulx as Secretary in Waiting Room

Lily Thibeault as Female Student at the Copy Room

Robert Reynaert as Teacher in First Classroom

Stéphane Julien as Student in the Escalator

Pierre-Xavier Martel as Security Guard

Marc-André Brisebois as Student in the Stairs

François-Xavier Dufour as Student in 3rd Floor Corridor

Sophie Desmarais as Female Student - 3rd Floor Corridor

Antoine Touchette as Male Student in Common Room

Emmanuelle Girard as Student Behind Speakers

Anne Trudel as Student Behind Speakers

Nathalie Girard as Injured Student

Eve Gadouas as Female Student in First Classroom

Marie-Évelyne Baribeau as Female Student in First Classroom

Valerie Cadieux as Female Student in First Classroom

Valérie Charland as Female Student in First Classroom

Cathy Labrecque as Female Student in First Classroom

Cynthia Wu-Maheux as Female Student in First Classroom

Josée Lacombe as Female Student in First Classroom

Alexis Lefebvre as Male Student in First Classroom

Julien Maranda as Male Student in First Classroom

Alexandre St-Martin as Male Student in First Classroom

Jonathan Dubsky as Distracted Student

Marc Francoeur as Valérie's Father

Dawn Ford as Valérie's Mother

Chantale Bilodeau as Physiotherapist

Eugénie Beaudry as Female Student at Blackboard

Denis Lehoux-Faucher as Engineer #1

Marc Gourdeau as Engineer #2

Nir Assayag as Male Student in First Classroom