Leah Cairns is a Canadian actress. She started her acting career in the 2000s. One of her initial performances was on the Canadian series Robson Arms. She next starred in the movie 88 Minutes, followed by the film Blood Angels. After some time, she appeared on the American series Kyle XY. She went on to join the main cast of the Canadian show Sanctuary. She also became known for her role as Lt. Margaret ‘Racetrack’ Edmondson on the popular series Battlestar Galactica. Other performances were in an episode of the US series Supernatural. She also landed a minor part in the movie Interstellar.