Saw II on top

"The Legend of Zorro," reuniting Antonio Banderas and Catherine Zeta-Jones in a sequel to the 1998 "The Mask of Zorro," followed at No. 2 with $16.5 million in its first three days.

"Prime," a comedy starring Uma Thurman and Meryl Streep, opened at No. 3 with $6.4 million.

Horse racing drama Dreamer, starring Kurt Russell and child star Dakota Fanning, slipped from number two to four, while Wallace and Gromit fell to number five.

Nicholas Cage's latest movie Weather Man, directed by Gore Verbinski of Pirates of the Caribbean fame, was a new entry at number six, with takings of $4.2m

Last weekend's champion, the videogame-inspired sci-fi thriller "Doom," dropped to No. 7 with $4.1 million.

Overall takings in the US and Canadian box office were down 6.5% on last year reports BBC