Stepsister from Planet Weird (television) A Disney Channel Original Movie, debuting on June 17, 2000. Fourteen-year-old Megan Larsen is stunned to discover that her mother’s exuberant new fiancé and his seemingly perfect daughter are actually aliens who have taken sanctuary on earth. Directed by Steve Boyum. Stars Courtnee Draper (Megan Larsen), Tamara Hope (Ariel Cola), Khrystyne Haje (Kathy Larson), Lance Guest (Cosmo Cola), Myles Jeffrey (Trevor Larson). Based on the book by Frances Lantz.