Callum Keith Rennie (born 14 September 1960) is a British-born Canadian television and film actor. He started his career in Canadian film and television projects, where his portrayal of Stanley Raymond Kowalski on the television series Due South was his first international success. After years acting in over 125 Canadian and international projects, he became widely known for his portrayal of the Cylon model number two Leoben Conoy on Battlestar Galactica, and following that, his role as record producer Lew Ashby on the Showtime series Californication.
Regularly cast as a bad guy in movies (and even more often in his numerous guest appearances on American television series), Rennie's regular participation in Canadian productions gives him an opportunity to show a broader range of his acting abilities, which have been recognized by several awards.
Rennie was born in Sunderland, Tyne and Wear, to Scottish parents. When he was four years old, the family emigrated to Canada. Rennie was brought up in middle-class Edmonton, Alberta, as the second of three boys. He graduated from Strathcona High School, where he met and befriended Bruce McCulloch from The Kids in the Hall. He dropped out from college and took up all sorts of odd jobs instead, leaving Edmonton for brief stays in Vancouver and Toronto before eventually settling in Vancouver. After a serious bout with alcoholism in his youth, Rennie managed to get his addiction under control at age 33 and was finally able to commit to acting.