Sharlto Copley plays Christian Walker on Powers. Copley is a South African actor, producer, and director. He is best known for his roles of Wikus van der Merwe in District 9, Howling Mad Murdock in the 2010 adaptation of The A-Team, Agent C.M. Kruger in Elysium, King Stefan in the film Maleficent, and Chappie in the film, "CHAPPiE".