Oscar Desgagnés was born in Montreal, the son of Catherine De Seve and fine art photographer Frank Desgagnes. He started acting at the age of 11 under the direction of Francis Leclerc in L'Arracheuse de temps (2021), playing Fred Pellerin, his favorite storyteller. He then played the child version of the role played by Pier-Luc Funk in Plan B (2017). His lead role of Max in the feature film Coco Ferme (2023) confirmed his enjoyment of storytelling through acting. We will see Oscar in theaters in 2024 in Chien et chat, Reem Kherici's next film distributed in France by Gaumont. He is passionate about soccer and is a witty, humorous boy.