Deadline is reporting that Saoirse will star in “Stockholm, Pennsylvania” alongside Cynthia Nixon.

Saoirse Ronan and Cynthia Nixon have been set to star in Stockholm, Pennsylvania, a psychological thriller scripted and to be directed by Nikole Beckwith. Pic marks her feature helmer debut and production begins next week in Los Angeles. The film is an adaptation of the play, and the script made the 2012 Black List and won the 2012 Nicholl Fellowship and came through the Sundance Screenwriting Lab. Greg Ammon is producing through his banner Fido Features in association with Olympus Pictures’ Leslie Urdang and Dan Halsted.

Ronan stars as developmentally stunted Leia, a young woman raised by a kidnapper who now struggles to acclimate to her actual parents after 20 years of separation. Nixon plays the girl’s grief-stricken mother, who goes to extreme lengths to recapture her daughter’s love. Jason Isaacs plays her captor, and David Warshofsky plays her father. Fido Features is a production/finance company that recently wrapped Shiva & May, the Diane Bell-helmed thriller that stars Jessica Biel and Zosia Mamet. Beckwith comes from the Public Theater’s Emerging Writer’s Group, and is repped by ICM Partners. Ronan, who will next be seen in the Susanne Bier-directed Mary Queen Of Scots and the Wes Anderson-directed The Grand Budapest Hotel, also stars in the Ryan Gosling-directed How To Catch A Monster. She’s repped by CAA and UK’s Macfarlane Chard. Nixon recently wrapped A Quiet Passion and Life Itself and James White, and stars in Amazon’s Alpha House and in the second season of NBC’s Hannibal. She is repped by UTA and Emily Gerson Saines at Brookside Artist Management. Isaac, who wrapped the WWII drama Fury and the NBC mini Rosemary’s Baby is repped by Gersh, ITG and Silver Lining, and Warshofsky is repped by Talentworks, Cornerstone and Patty Woo Management.