In October 2006, along with Gabriel Byrne, Christopher Plummer, Max von Sydow, and Susan Sarandon, he filmed "Emotional Arithmetic", directed by Paolo Barzman and adapted by Barzman and Jefferson Lewis from the novel by Canadian writer Matt Cohen (1942–1999), who had written several drafts of a screenplay adaptation himself before his death. Dupuis plays Benjamin Winters, the "embittered" son of Melanie Lansing Winters (Sarandon) and her husband, David Winters (Plummer). The film closed the 2007 Toronto International Film Festival on September 15, 2007.