Claude mentions something about "Lac-Saguay" in one point in the movie. This is Claude Gauthier's place of birth.
Along with participating with the script, poet Gerald Godin has a small role in this movie. So was his then-wife, Pauline Julien, in the elevator scene, along with some promo posters of her at the time (when she was quite popular).
The lead roles have their real first name as their characters: "Claude" Gauthier and "Geneviève" Bujold.