Movies
The 3-D family film takes in an impressive $58 million, the third highest March opening of all time, to secure the top spot ahead of horror movie The Haunting In Connecticut.
Last week's number one Knowing, comedy I Love You, Man and romantic thriller Duplicity round out the top five.
The only other new entry, WWE star John Cena's 12 Rounds, lands at number seven.
The US box office top ten in full:
1. (-) Monsters Vs. Aliens - $58,200,000
2. (-) The Haunting In Connecticut - $23,010,000
3. (1) Knowing - $14,705,000
4. (2) I Love You, Man - $12,600,000
5. (3) Duplicity - $7,556,000
6. (4) Race To Witch Mountain - $5,637,000
7. (-) 12 Rounds - $5,300,000
8. (5) Watchmen - $2,755,000
9. (7) Taken - $2,700,000
10. (6) The Last House On The Left - $2,611,000
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