Guy Nadon is a French-Canadian actor. Though his most notable English-language role was arguably in H₂O, his other works have been in his first language of French. In 2010, he was appointed a Member of the Order of Canada.
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| 2024 | We Are Zombies as Bob Coleman |
| 2023 | Le temps d'un été as Maître |
| 2021 | Rüya Ülkesi as Mother |
| 2021 | Félix et le trésor de Morgäa as Tom (voice) |
| 2020 | Chef en pandémie as Narrator (voice) |
| 2019 | Merci pour tout as Guy |
| 2017 | Junior Majeur as Mike Boulanger |
| 2014 | Elephant Song as Dr. Craig Jones |
| 2014 | L'ange gardien as Normand |
| 2014 | Le coq de St-Victor as Lucien Thomassin |
| 2012 | Les Pee-Wee 3D : L'hiver qui a changé ma vie as Mike Boulanger |
| 2010 | Cabotins |
| 2005 | Les Moutons de Jacob as Voix de Jacob |
| 2004 | H2O as Marc Lavigne |
| 2003 | Les Immortels as Alcide |
| 2002 | La légende du sapin de Noël as Sapin (voice) |
| 2002 | Les Dangereux as Boiteuse |
| 1998 | Le Cœur au poing as Julien |
| 1997 | Les mille merveilles de l'univers as Schulz |
| 1997 | J'en suis! as Dr. Lamoureux |
| 1996 | Caboose as Curé |
| 1994 | Windigo as Jean Fontaine |
| 1994 | Craque la vie! as Robert Gignac |
| 1993 | Heritage Minutes: La Bolduc as Mr. Beaudry |
| 1989 | Trois pommes à côté du sommeil as The editor |
| 1987 | Le Grand Jack |
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