Stepsister from Planet Weird

Stepsister from Planet Weird is a Disney Channel Original Movie which was released in June 2000. Directed by Steve Boyum, it stars Courtnee Draper, Tamara Hope, Lance Guest, and Khrystyne Haje. Based on the book of the same name by Francess Lantz, the plot follows a teenage girl (Draper), who discovers that her mother's fiance (Guest) and her own future stepsister (Hope), are actually strange aliens from another planet hiding out on Earth.