"High School Musical" star Ashley Tisdale will make her feature film debut in 20th Century Fox's adventure comedy "They Came From Upstairs" says Reuters.

The script, by Mark Burton and Adam F. Goldberg, revolves around a group of teens who team up to defend their Maine vacation home from aliens who have invaded via the upstairs.

Robert Hoffman ("Step Up 2 the Streets"), Carter Jenkins ("Viva Laughlin"), Austin Butler, Ashley Boettcher and Henri and Regan Young are also cast.

John Schultz is directing with Barry Josephson producing. Production starts at the end of January in Auckland, New Zealand.