New York/Los Angeles  - The first Chronicles of Narnia sequel opened atop the North American box-office rankings with three-day ticket sales of 56.6 million dollars, according to preliminary studio estimates issued Sunday.

The Chronicles of Narnia: Prince Caspian opened Friday.

The movie is the second film adaptation from British novelist CS Lewis, after 2005's profitable, big-budget production of The Chronicles of Narnia: The Lion, the Witch and the Wardrobe.

In the second instalment, four siblings return to the magical land of Narnia. (dpa)