Stephanie Grace Morgenstern is a Canadian actress, filmmaker, and screenwriter for television and film. Born in Geneva, Switzerland and raised in Montreal, Quebec, Morgenstern began her acting career when she was 15. She has worked extensively on stage, film, and television in both English and French. Her most widely seen feature film credits have been The Sweet Hereafter, Maelstrom, Revoir Julie and Forbidden Love. Morgenstern is also widely recognized by anime fans as the voice of Sailor Venus in the DIC Entertainment English dub of Sailor Moon in the first few seasons as well as the movies.

Along with her writing partner and husband Mark Ellis, Morgenstern created Flashpoint, a Canadian TV police drama which premiered July 2008 on CTV and CBS, and ran for five years before the show ended by creative choice in 2013. The show was awarded the Academy Board of Directors Tribute for Outstanding and Enduring Contribution to Canadian Television, in addition to a Gemini Award (2009) for Best Dramatic Series and a Canadian Screen Award (2013). Flashpoint has been sold to over 50 countries outside of Canada and the US.

She and Mark Ellis recently completed the third and final season of X Company, a WWII espionage thriller set in France, Germany and Canada. It aired on CBC Television beginning in 2014, and has sold to many territories internationally, including France (TF1), UK(History), the United States (Ovation), Latin America (History), and Japan (Mystery). It was also a Canadian Screen Awards nominee for Best Dramatic Series.

Morgenstern has been twice nominated for Genie (Canadian Academy) Awards for directing the short film Remembrance, which she also co-wrote and co-starred in with her husband Mark Ellis, and co-directing (with her brother Mark Morgenstern) the short film Curtains, which she also wrote, an in which she played the lead role.