Claim: Beyoncé Knowles acted in Obsessed.

Obsessed is a 2009 American thriller film directed by Steve Shill . The Rainforest Films production stars Idris Elba , Beyoncé , and Ali Larter . Obsessed tells the story of Lisa , an office temp played by Larter , who develops romantic feelings for her boss , Derek Charles -LRB- Elba -RRB- , and repeatedly attempts to seduce him . Derek 's wife , Sharon -LRB- Beyoncé -RRB- , learns of Lisa 's obsessive behavior , and suspects an affair . Screen Gems president Clint Culpepper conceived the basic idea of Obsessed , which was then developed by writer David Loughery , allocated a production budget of $ 20 million , and filmed in the summer of 2008 . Obsessed was inspired by the work of directors Roman Polanski and Alfred Hitchcock , and its score was written by James Dooley . Lisa and Sharon were dressed in contrasting styles to reinforce their conflicting characters . Obsessed opened in US theaters on April 24 , 2009 , and UK theaters on May 29 , 2009 , and was distributed by Screen Gems .   Obsessed received generally negative reviews from critics , many of whom were disappointed in the absence of an explanation for Lisa 's obsession with Derek . Others noted that the potential theme of interracial conflict between the Charles family , who are black , and Lisa , who is white , was unexplored . The storyline of Obsessed has been compared with that of Fatal Attraction -LRB- 1987 -RRB- - a recollection in which Elba and Beyoncé have the Michael Douglas and Anne Archer roles , respectively , while Larter is in Glenn Close 's - although film critics disliked the fact that Derek did not yield to Lisa 's seduction . The fight scene finale between Sharon and Lisa , however , was commended by reviewers , and won the MTV Movie Award for Best Fight . Obsessed spent its first week atop the US box office , and grossed $ 73.8 million from theaters , internationally . Sony Pictures Home Entertainment released the film for home viewing on August 4 , 2009 , in the US and has sold 1.3 million DVDs , worth $ 21 million of consumer spending .