Antoine Bertrand as Louis Cyr

Guillaume Cyr as Horace Barré

Rose-Maïté Erkoreka as Mélina Cyr

Gilbert Sicotte as Gustave Lambert

Gil Bellows as Richard K. Fox

Cliff Saunders as Mac Somher

Amélie Grenier as Philomène Cyr

Éliane Gagnon as Émiliana Cyr (18 ans)

Naomi La as Émiliana Cyr (4-6 ans)

Frédéric Lemay as Pierrot Cyr (18 ans)

Charles-Olivier Pelletier as Pierrot Cyr (10 ans)

Nico Racicot as Adam Pricket

Normand Carrière as Pierre Cyr

Marilyn Castonguay as Marie-Amélina Cyr (19 ans)

Elias Toufexis as Bryce Johnston

Dave Simard as Eugene Sandow

Simon Boudreau as David Michaud

Neil Kroetsch as Dr. Dudley Sargent

Gaston Caron as Président Société St-Jean Baptiste

Alain Lépine as Honoré Mercier

Olivier Archambault-Bouffard as Homme fort #2

Patrick Caux as Homme fort #3

Eugene Brotto as British reporter

Chris Cavener as Irlandais #1

Charlotte Comtois as Émiliana Cyr, bébé

Irlande Côté as Soeur de Louis Cyr

Myriam Côté as Contorsionniste

Martin Dansky as Dr. Morgan

Pierre Gaudette as Manager

Alain Goulem as Professor Attila

Annabelle Guérin as Odile Cyr (6 ans)

Mireille Jodoin as Infirmière

Thomas Liccioni as Mulligan

Marc-Olivier Maheu as Circus Spectator

Olivia Palacci as Dame (fan de Sandow)

Maude Payette as Dame (autographe Ferme Cyr)

Marc Primeau as Circus Spectator

Sébastien Rouleau as Militaire bagarreur

Dany Tanguay as Strongman

Brian D. Wright as British Reporter

Émilise Lessard-Therrien as Crowds

Michael Richard as Employé du cirque