Apparently the Hallmark Channel is filming a movie on location in the Piedmont Triad and one of the locations they're using is Lewisville. Here's the story in the Greensboro News & Record and the Hallmark Channel's press release. The movie will be based on the book The Shunning by Beverly Lewis.
Not sure where they're going to shoot, but there are at least four locations listed on the NC Piedmont Triad Film Commission's website. You can probably guess a few of the locations listed on the website:
If you're in Lewisville and you see a bunch of people running around with a camera you can guess what they're up to.