In 2012 , he originated the role of Billy Stanhope on Two and a Half Men .
In December 2011 , Oswalt played Matt Freehauf in Jason Reitman 's black comedy Young Adult .
In 2012 , Oswalt originated the role of Billy Stanhope on Two and a Half Men .
In December 2011 , Oswalt played Matt Freehauf in Jason Reitman 's black comedy Young Adult .