Rennison continued to work on more Canadian projects such as the short lived but critically acclaimed These Arms of Mine for CBC, which landed her a Gemini Award nomination, and the Emmy Award winning casting Director Coreen Mayrs' independent film A Feeling Called Glory (based on the short story "The Presbyterian Sidewalk" by Barbara Gowdy), for which Rennison won a Gemini in 2001, making her the youngest ever winner at 13. In 2005, Chris Haddock (of Canadian drama "Davinci's Inquest"), who was familiar with her work, hand selected her to play a variation of Kelly Ellard (convicted killer of Reena Virk) for a recurring role in "Davinci's City Hall". Most recently Rennison has appeared in the films American Venus, Boot Camp with Mila Kunis, and What Goes Up starring Hilary Duff, Steve Coogan and Molly Shannon. Rennison has also appeared in the television series Highlander: The Series, Poltergeist: The Legacy, Millennium, and The Sentinel. She appeared twice on Stargate SG-1 as Ally and as Cassandra.