Born in Montreal, Quebec, Guérard first came to prominence as a cast member on the teen drama series Watatatow, she also appeared in the films White Skin (La Peau blanche), Angel's Rage (La Rage de l'ange), Piché: The Landing of a Man (Piché: entre ciel et terre), French Kiss and The Guide to the Perfect Family (Le Guide de la famille parfaite), and the television series Le Négociateur and Mensonges