From Wikipedia, the free encyclopedia. Julie McNiven (born October 11, 1980, height 5 6 (1,68 m)) is an American actress. McNiven was born in Amherst, Massachusetts. She is best known for her recurring roles in Mad Men and Supernatural. McNiven currently has a recurring role in the 2010-2011 second season of Stargate: Universe. McNiven studied swinging trapeze as a teenager at French Woods Festival of the Performing Arts. She also attended the summer program at Circle in the Square. She is a graduate of Salem State University (Salem, Massachusetts).