“Zero Dark Thirty” thesp Mark Strong is set to star opposite Nicole Kidman in Rowan Joffe’s psychological thriller “Before I Go to Sleep,” which is being shopped to foreign buyers at AFM.Joffe is adapting S.J. Watson’s bestselling book of the same name for Millennium Films/Nu Image. Story follows a north London woman (Kidman) who wakes up every morning remembering nothing. Her husband tells her she suffered a trauma, and that she dare not leave home. She sneaks off to a doctor (Strong) who gives her a small digital recorder and urges her to play back her thoughts day after day in hopes of re-integrating her mind. Scott Free’s Ridley Scott and Liza Marshall are producing with Mark Gill and Matthew O’Toole, while exec producers include Peter Heslop, Avi Lerner, Danny Dimbort, Trevor Short, Boaz Davidson and John Thompson. Pic is skedded to lense early next year in London. Strong, who will next be seen in Kathryn Bigelow’s “Zero Dark Thirty,” recently wrapped “Welcome to the Punch” with James McAvoy. He’s currently filming the indie pic “Mindscape” and will soon be seen in AMC’s “Low Winter Sun.” Strong is repped by CAA and Markham, Froggatt and Irwin.