Robert Lepage as Phillippe / André

Céline Bonnier as Nathalie

Anne-Marie Cadieux as La mère

Marco Poulin as Carl

Érika Gagnon as Philippe's Supervisor

Fabrice Mongeau as Philippe à 15 ans

Raphaël Dury as Philippe à 7 ans

Étienne Bouchard-Dauphin as André à 8 ans

Gregory Hlady as L'interpréte

Yves Amyot as Le barman

Richard Fréchette as Le médecin

Sophie Faucher as Presenter

Lorraine Côté as Marie-Madeleine Bonsecours

Sergei Priselkov as Alexei Leonov

Oleg Belkin as Le garde du corps

Sylvain Massé as L'agent de sécurité du Cosmodrome

Myriam LeBlanc as La réceptionniste de l'hôtel

Véronique Aubut as L'infirmière

Olivier Bolvin St-Jean as L'enfant de Nathalie

Alexandre Sadeisky as Le concierge

Agnieszka Baran as L'hôtesse de l'air

Brigitte Bilodeau as La maquilleuse

Yves Charbonney as

Miguel Fernandes as

Richard Olgnac as

Michel Gariépy as

Jean-Marie Dagonais as

Éric Joubert as

Claire Vaillaincourt as

Bernard Grondin as

Claude Soucy as

Geneviève Gagnon as Cook

Konstantin Tsiolkovsky as Self (Archive Footage)