If you've seen the Facebook post going around, then you might have been fooled by it. It does look pretty legit. But no, Matt Damon isn't buying a house in Lubbock.
I'm guessing the hardest character to portray in a movie would be a non-fictional one, like President John Kennedy, or an icon like Steve Jobs. And now, Michael Douglas is taking over the role of the one-of-a-kind Liberace.