Reese Witherspoon's animated debut, MONSTERS VS. ALIENS, has scared up a box office hit in the U.S. - her new film has opened with an impressive $58.2 million (£41.5 million).
The movie, in which the Oscar winner voices a giant woman, scored the top spot ahead of another debut, horror thriller The Haunting in Connecticut, which took the new number two spot with an opening weekend $23 million (£16.4 million) take.
Nicolas Cage's Knowing drops to three from last week's top spot.