In Kids vs. Aliens (out Jan. 20), Dominic Mariche and Phoebe Rex play young siblings who do indeed find themselves facing off against an extraterrestrial threat.

"It's about this kid named Gary who's trying to make movies with his older sister Samantha," says director and co-writer Jason Eisener. "She's been in all his films, and all of a sudden, these teenagers, kids that are the age of Samantha, come into her life. They make her feel self-conscious for hanging out with her younger brother and so she sacrifices a bit of who she is. All the while, aliens have crash-landed in the ocean in their backyard, and when these teenagers pressure Samantha to have a Halloween party when her parents have gone away, the aliens come up out of the ocean and start abducting the kids, and Samantha has to try and save her younger brother."