Most recently, de la Roche was the subject of a Red Queen Productions and National Film Board of Canada co-production, "The Mystery of Mazo de la Roche", which premiered on March 17, 2012 at the Festival international du film sur l'art in Montreal, then had its Toronto Premiere at Hot Docs April 29/12. The film is directed by Maya Gallus, produced by Justine Pimlott and Anita Lee, and combines archival material with dramatic reenactments featuring Severn Thompson as Mazo de la Roche. The film "lend(s) credence to the theory that its subject was a closeted lesbian", although several people in the film who knew de la Roche and Clement, including their adopted daughter Esmée, state on-camera that they believe the relationship between the two was close but ultimately platonic.