Wish Upon a Star is a 1996 television film directed by Blair Treu, written by Jessica Barondes, and starring Katherine Heigl and Danielle Harris. It focuses on two teenage sisters that magically swap bodies because of a wish made on a shooting star. They spend several days living each other's life, sometimes with the intent to sabotage the other's reputation and achievements, but they learn to appreciate and help each other along the way. The tagline to this movie is "I Wish I May, I Wish I Might, Become My Sister For A Night!"
The two Wheaton sisters share a household and a high school, but both feel that they have little else in common. 18-year-old Alexia's (Katherine Heigl) days revolve around being popular, dressing stylishly, and spending time with her jock boyfriend, while exerting minimal effort academically. While 15-year-old Hayley (Danielle Harris) is socially reserved, admiring her older sister's popularity from a distance while excelling in her studies, particularly science and mathematics. Hayley and Alexia don't get along well at all, with Hayley resenting her reliance on her frequently late sister for a ride to school and Alexia preferring not to be seen with her less-than-cool younger sister.