She played Catherine in Le Chalet (2015-2018).
Brunet does extensive dubbing for the French releases of films in Quebec.
She has dubbed Miley Cyrus, Emilia Clarke, Jennifer Lawrence, Evanna Lynch (the Harry Potter film series), Ella Purnell (Miss Peregrine's Home for Peculiar Children), Daisy Ridley (Star Wars: The Force Awakens), Margot Robbie (Suicide Squad), and Emma Stone.
In the media, she has talked about her body image, suggesting she was more comfortable in front of the camera than at school, where people would taunt her as "grosse" ("fat") and "naine" ("dwarf").
She was with UNICEF Quebec as a spokesperson from 2000-2003, and ambassador from 2003-2008.She has known director Xavier Dolan since age 12, working together on-screen and in dubbing, and was with him when he came out to his parents.
She has appeared as an extra in his films Mommy and The Death and Life of John F.