From Wikipedia, the free encyclopedia. Chelah Horsdal (born June 19, 1973) is a Canadian actress and model.[1] She is well known for her supporting roles in the TV series' Stargate SG-1, Level Up, Hell on Wheels, When Calls the Heart, Arrow, and for her roles in the films Aliens vs. Predator: Requiem and Rise of the Planet of the Apes.