Rosemary was the younger sister of former US President John F Kennedy, and the third child of Joseph P Kennedy and Rose Fitzgerald, according to The Hollywood Reporter.
The film's story is based on a Black List spec script by first-timer Nick Yarborough, will chronicle the life of Rosemary, who spent a lifetime hidden from public view because of the political ambitions of her father, Joseph Kennedy.
"The movies about the Kennedy family are deservedly stormy affairs, but here's a story about the storms within all of us.
Jason Michael Berman and Kevin Turen will produce the project along with Moss.
Richard Arlook, Allard Cantor, and Jarrod Murray will serve as the executive producers.
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