Los Angeles – The college thriller The Roommate has moved into the top spot at the box office with a $15.6m debut over a typically slow Super Bowl weekend as the National Football League championship game preoccupies movie fans.
The Sony release features Leighton Meester as a psycho freshman who becomes obsessed with her new roommate, played by Minka Kelly.
The 3D underwater cave adventure Sanctum, whose producers include Avatar creator James Cameron, drew modest crowds and came in second with $9.2m. Released by Universal, Sanctum is a survival story about explorers trapped underground in flooded caves during a monster storm.
The previous weekend's No 1 movie, Anthony Hopkins' exorcism thriller The Rite, fell steeply to sixth place with $5.6m. The Warner Bros. release raised its 10-day total to $23.7m.