Kai Greene had a difficult childhood growing up in foster care but found solace in weight training. He became intensely interested in his own physique and used his body as a subject to study space, movement, and create works of art. Kai Greene is a professional bodybuilder who has won numerous competitions, including first place finishes at the 2011 New York Pro, 2010 Arnold Classic, and 2010 Australian Grand Prix. He has placed as high as fourth in Mr. Olympia competitions.