Pilon landed his first job playing in an ad on the French Canadian RDS sports channel in 2009 when he was 12. In 2010, he played the lead role of Frisson in Frisson des collines followed by roles in Just for Laughs: Gags, and importantly in Xavier Dolan's film Laurence Anyways.
In 2012, he took part in a number of television series playing lead role of William in Les Argonautes, a youth series on Télé-Québec and role of Clovis in Radio-Canada television series Mémoires Vives. He also took part in two seasons of Tactik, a youth series on Télé-Québec and a role in the short film Le Siège and role of Janeau Trudel in the feature film Les Pee-Wee 3D: L'hiver qui a changé ma vie. In 2013, he appeared in the Indochine music video for "College Boy". The controversial video about school bullying was directed by Xavier Dolan and banned on certain stations for viewers below 16.
Cooperation with Xavier Dolan culminated in a lead role in Mommy, also by Xavier Dolan. The film co-won the Jury prize at the 2014 Cannes Film Festival. Pilon was named one of the best actors under the age of twenty.
Music videos
2013: "College Boy" (song by Indochine) as a bullied student (directed by Xavier Dolan)
