Obsessed is a 2009 American psychological thriller film directed by Steve Shill and written by David Loughery. It stars Idris Elba, Beyoncé and Ali Larter alongside Bruce McGill, Jerry O'Connell and Christine Lahti. The film follows Lisa Sheridan (Larter), an office temp who develops unrequited feelings for her boss, Derek Charles (Elba), and repeatedly attempts to seduce him. Derek's wife, Sharon (Beyoncé), learns of Lisa's escalating behavior and suspects her husband is having an affair. Obsessed premiered at the School of Visual Arts on April 23, 2009, and was theatrically released by Sony Pictures Releasing under its Screen Gems label in the United States the following day. The film was panned by critics, who criticized the absence of an explanation for Lisa's obses
