According to The Hollywood Reporter, The charms and wizardry of Warner Bros. Pictures' Harry Potter and the Prisoner of Azkaban was strong enough to enable the film to repel three robust wide releases and maintain its position in the top spot with an estimated $35.1 million. But new product, combined with the charms of DreamWorks' Shrek 2, was enough to erode the sophomore session of "Azkaban" by a steep 63% from its debut.

Nevertheless, the Alfonso Cuaron-directed "Azkaban" reached the $100 million mark in a fast four days and has grossed a sturdy $158.1 million in just 10 days. Among the three new wide releases, Universal's The Chronicles of Riddick, starring Vin Diesel and helmed by David Twohy, fought its way into the second spot with an estimated debut of $24.6 million.

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The sci-fi actioner arrived at the low end of expectations, but it was a solid opening nonetheless, besting Shrek 2 and easily topping the four-day weekend gross of Pitch Black ($13.5 million), the film that spawned the character of Riddick.