Obsessed

Obsessed is a 2009 American psychological thriller film directed by Steve Shill and written by David Loughery. Starring Idris Elba, Beyoncé Knowles, and Ali Larter, the film tells the story of Lisa (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 obsessive behavior, and suspects an affair. Obsessed was inspired by the work of directors Roman Polanski and Alfred Hitchcock, and its score was written by James Dooley. It was released in the United States on April 24, 2009, by Sony Pictures Releasing through Screen Gems.