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Amber Heard

and Ed Harris have joined

James Franco

in “

The Adderall Diaries

.”

Based on the Stephen Elliot memoir, the pic also stars Christian Slater, Cynthia Nixon and Jim Parrack.

The story centers on the gripping account of a young man navigating the unstable terrain of truth and identity. Robert Redford is exec producing and Pamela Romanowsky is directing.

The film is being co-produced by Rabbit Bandini Productions partners James Franco and Vince Jolivette, and Windowseat Films producers James Reach and Joseph McKelheer. It is being financed by Peregrine Entertainment Capital and is Executive Produced by Leo Kiely, Bill Kiely and Ryan Dorff.

WME Global, who reps Elliot and Heard, and CAA, who reps Harris brokered the deal and are representing domestic rights. Kathy Morgan of Kathy Morgan International is handling international distribution.

2014 Variety Media, LLC, a subsidiary of Penske Business Media; Distributed by Tribune Content Agency, LLC