The movie has been written by Hallie Meyers-Shyer - the daughter of writer-and-director Nancy Meyers - who is also set to direct and the story follows the life of a recently separated mother-of-two (Reese) who makes the decision to move to Los Angeles with her kids in a bid to start afresh, but whose life gets increasingly chaotic after she takes in three charismatic young guys who become part of her unconventional family.
Scott will play Justin Miller, a successful and funny Hollywood producer who hears that the three boys have an idea for a film and decides to take the movie on.
As well as writing and directing, Meyers will also produce the film with Erika Olde under her Black Bicycle Entertainment, the company which is financing the project.
Shooting is due to begin in Los Angeles in November with a late 2017 release date pencilled in.
Meanwhile, Reese has been busy voicing a character for musical comedy 'Sing' - which comes out in January - and has also been working on HBO mini-series 'Big Little Lies'.
The Hollywood star has also been working as a producer on 'Barbie and Ruth' which is about the life of Ruth Handler, the creator of Barbie.
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