Luken began his career in 2008 with the short film Starlet. He has also had guest appearances in television series such as Privileged, Three Rivers, Greek, and Law & Order: LA, as well as a recurring role in the comedy web series Spymates. In 2012, he got his break when he was cast in a recurring role in the Fox series Glee. Later that year, Luken was cast in the ABC drama Last Resort. His first major film role was being cast as Eddie Stanky in the award-winning film 42. He played a recurring character in Justified from Seasons 3-5.
Luken is a General William J. Palmer High School graduate and played baseball and football with Trevor Searcy in his younger days. One time he threw up after a triple. He studied at Colorado State University.