Marie Beath Badian is a Toronto playwright, actor, and dramaturge. Her work includes Prairie Nurse (Blyth Festival), The Making of St. Jerome (Next Stage Theatre Festival, nominated for three Dora Mavor Moore Awards), Mind Over Matter (Convergence Theatre), and Novena (UnoFestival Victoria, Toronto Fringe Festival). In addition to a CBC Radio Drama adaptation of Novena, she has also written for CBC Radio's Outfront.

She has been Playwright-in-Residence at fu-GEN Asian-Canadian Theatre Company and with Project Humanity. She was a member of the HotHouse Playwright Unit at Cahoots Theatre Company and a member of the 2013 Tarragon Playwright Unit.

Marie Beath spent two seasons as Director of the Blyth Festival Young Company, two seasons as Co-Director of Youth Programs at Nightwood Theatre, and two seasons as Associate Artistic Director/Associate Artist at Theatre Direct Canada. She is a graduate of the Ryerson Theatre School.