Cody Allen Christian (born April 15, 1995) is an American teen actor. He is best known for his recurring role as Mike Montgomery in the ABC Family series Pretty Little Liars. His other acting credits include Back to You, True Blood and Grey's Anatomy. He also appeared in the 2011 film Kill the Irishman. Cody Christian also starred in the Starving Games, a parody of the Hunger Games, as Peter Mellarky. In 2015-2016 he plays the main villain in MTV's Teen Wolf as Theo Raeken.