As an actor, Diana is best known to television audiences as Stephanie Long on CBC's Riverdale and Lucy Ramone (Busy's mom) on Ready or Not for Global/Disney. She has appeared in over forty TV series, movies of the week and feature films and worked with such esteemed directors as John Huston, Robert Altman, Allan King, Lee Grant and Kinji Fukusaku. Theatre highlights include: The Diary of Anne Frank (Manitoba Theatre Centre); Amadeus, The Little Foxes (Asolo State Theatre); Top Girls (Arbour Theatre); A Streetcar Named Desire (Theatre Aquarius); A Doll’s House (Banff Centre); Hedda Gabler (Magnus Theatre) and Charlie's Aunt (Capitol Theatre). Diana’s directing credits include: Loose Ends (The National Theatre School of Canada); Under the Skin, If Betty Should Rise (Grand Theatre, London), Amadeus (Theatre Sheridan) and over 30 concert play readings for The First Stages Theatre Company of which she is the former and founding Artistic Director.
In addition to her long-time association with Ryerson School of Performance, Diana teaches Acting Technique, Scene Study, Audition Preparation, Text Analysis and Acting for the Camera at Sheridan College and Acting for the Camera at George Brown College in the Acting for Media Program, which she helped create in 2016. She has also taught and directed at Florida State University, Humber College (Acting for Film and Television), The National Theatre School of Canada (Acting Technique; Scene Study), The National Ballet of Canada (Acting Technique; Scene Study), and at her own professional theatre training workshop.
Diana holds a Masters degree (MA) in Theatre and Performance Studies from York University.