Colin Farrell is no stranger to doing fake cocaine in front of the camera. The Irishman was required to snort multiple lines for Martin McDonagh's 2008 indie hit In Bruges, and Farrell (having admitted to using real cocaine along with other hard stuff on a weekly basis when he first arrived in Hollywood) was certainly convincing in the scene. He was asked to get back into the habit for 2011's Horrible Bosses.

His character Bobby is an intolerable cokehead who only cares about stripping the assets of his late father's business to feed his lifestyle. According to the film's prop master Mychael Bates, Farrell was so intent on staying in character that he would snort the fake cocaine between takes, but what exactly was in it? "I always use powdered lactose," Bates revealed. "You can snort it for real, and it doesn't affect you. It's just a milk product."