Sophie Cadieux (born August 25, 1977) is a Quebec actress. She studied theater at the Conservatoire d'art dramatique de Montréal from 1998 to 2001. She has an improvisational theater background from her time in the Quebec improvisational leagues of the Mouvement d'improvisation de Montmorency (MIM), the Limonade, the Ligue d'improvisation montréalaise (LIM), the Cravates, and the renowned Ligue nationale d'improvisation (LNI).