Outside of the film, TV and theatre world, Mary is an outspoken advocate for mental health and addiction awareness. Among the many charities and organizations she supports are the Wabano Centre for Aboriginal Health in Ottawa, the CNIB, St. Joseph’s Hospital and CAMH. She has been quite outspoken in politics, most recently launching a full scale attack on Stephen Harper in the 2015 Federal Election campaign when her character Marg Delahunty rolled out her “Marg Brings Change” campaign.