Originally titled They Came From Upstairs, Aliens in the Attic stars Ashley Tisdale and Weeds actor Kevin Nealon.

As the name suggests, the film centers on a group of kids that must defend their home from, well, aliens in the attic.

It opens on July 31 and you can watch the official trailer below:

[video url="http://www.moviefanatic.com/videos/aliens-in-the-attic-trailer/" title="Aliens in the Attic Trailer"] [/video]