Saoirse Ronan has joined the cast of ‘The Unforgivable’ director Nora Fingscheidt adaptation ‘The Outrun.’

Based on Amy Liptrot’s best-selling memoir, Ronan will play Rona, a woman fresh out of rehab who, after more than a decade away, returns to Scotland’s wild Orkney Islands and to the sheep farm of her childhood.

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Fingscheidt and Liptrot have adapted the book for the screen. Brock Media – who optioned The Outrun – will produce the film alongside Ronan, Jack Lowden and Dominic Norris under their new shingle Arcade Pictures together with Ignacio Salazar-Simpson and Ricardo Marco Budé of Mogambo. Jonas Weydemann and Jakob D. Weydemann of Germany’s Weydemann Bros. will co-produce together with BBC Film and Screen Scotland, which supported the project’s development. Protagonist is the executive producing and arranged financing.

“It was Amy’s voice that first drew me to The Outrun,” said Ronan in a statement. “Her unusual way of seeing things in a way that perhaps you only can when you’ve been to the darkest place you can go within yourself. I have been waiting to play a part like this — the messiness, hopefulness, dreaminess, authenticity and humour we want to achieve — I’ve been scared of it, but with Nora, I feel ready.”