EXCLUSIVE: Bella Thorne and Patrick Schwarzenegger have been cast as the leads of Midnight Sun, a YA love story that will be financed by Boies/Schiller Film Group. Scott Speer (Step Up: Revolution) is set to direct the pic from a script by Eric Kirsten.

Based on a 2006 Japanese film, Midnight Sun centers on Katie (Thorne), a 17-year-old sheltered since childhood and confined to her house during the day by a rare disease that makes even the smallest amount of sunlight deadly. Fate intervenes when she meets Charlie (Schwarzenegger) and they embark on a summer romance. A September shooting start is planned.

John Rickard and Zack Schiller, who are collaborating on the Fletch redo with Jason Sudeikis at Relativity, are producing. David Boies, James McGough, Alan Ou, Hiroki Shirota and Speer executive producing. Devin Andre will co-produce. WME Global is handling the domestic sale.

Boies/Schiller Film Group also produced and financed Jane Got A Gun starring Natalie Portman, and Rickard is behind New Line’s How To Be Single, which is now in production for a Valentine’s Day 2016 release.

Thorne is the former Disney Channel star who recently signed on to the AwesomenessTV movie Shovel Buddies and is attached to the ABC Family drama project Famous In Love from Pretty Little Liars exec producer/showrunner I. Marlene King. She is repped by WME and LBI Entertainment. Schwarznegger, next up in Paramount’s Scouts Vs. Zombies, is repped by Management 360 and Bloom Hergott.

Speer is repped by WME, Principato-Young and Bloom Hergott. Kirsten is repped by Benderspink and attorney Joseph Weiner.