Can Bella Thorne and Patrick Schwarzenegger find a spark of chemistry before ‘Midnight Sun’ sets?

The ailing-teen romance is a rite of passage for many young stars. Mandy Moore had “A Walk to Remember,” Shailene Woodley had “The Fault in Our Stars,” and never forget the patient zero of these movies: the 1970s cancer tear-jerker “Love Story” that has kept Ali MacGraw forever young on-screen.

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