Beyoncé stans have something new to add to their own obsessed collection... The official movie poster for the thriller Obsessed, starring Idris Elba, and Ali Larter. Beyoncé takes another stab at acting as she portrays Idris Elba’s wife in the new movie Obsessed, in theaters April 24. I can just hear Beyoncé’s character saying “You don’t want none of this b%$ch!”