Most of us here are probably not actors or actresses and most of us here probably don't even watch movies like Twilight. But given a chance to have a role in a Twilight movie, would you take it?
It's not the main role, but not exactly a one-liner either. It's enough to get you noticed on a national scale (by people who watch Twilight and other directors and such). Let's say the pay is exactly what you get paid now and the time commitment is the same. If you're employed your boss would give you the time off without consequences. If you're unemployed you also get paid nothing.