Sci-fi thriller 'Limitless' has topped the North American film chart as box office takings continue to suffer compared with last year.
The film, starring Bradley Cooper as a writer who takes a pill to maximise his brain power, took $19m in its first weekend, according to estimates.
Comedy 'Rango' was second ahead of last week's number one, 'Battle: Los Angeles'.
It is the fourth weekend running that overall box office takings have been down compared with last year.
Animated Western 'Rango', featuring the voice of Johnny Depp, took $15.3m in its third weekend while alien invasion film 'Battle: Los Angeles took' $14.6m.
'The Lincoln Lawyer', a thriller starring Matthew McConaughey as a defence lawyer in a high-profile case, opened in fourth, with $13.4m.
Alien road trip film 'Paul', written by and starring British actors Simon Pegg and Nick Frost, opened in fifth, taking $13.2m.
Paul Dergarabedian, of box office tracker Hollywood.com, said: "The first quarter of 2011 has been one we'd like to forget with comparisons to last year making things tough, week after week."
Monday, 21. March 2011 at 17:24
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