Why was Sharlto Copley replaced by Timothy Olyphant in DJ Caruso's I Am Number Four? Variety says "scheduling conflicts," but FilmDrunk has the much more fun behind-the-scenes story, where Caruso wouldn't let Copley wear a prosthetic nose and Spock ears to play the film's inconspicuous, human-looking alien. For the District 9 alum, it's apparently alien-human hybrids or bust! [FilmDrunk via Slashfilm]