1) The Dark Knight $75.6 million

2) Step Brothers $30 million

3) Mamma Mia! $17.8 million

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4) The X-Files: I Want to Believe $10.2 million

5) Journey to the Center of the Earth $9.4 million

6) Hancock $8.2 million

7) WALL-E - $6.3 million

8) Hellboy II: The Golden Army $4.9 million

9) Space Chimps $4.3 million

10) Wanted $2.7 million

Another week, another set of records for The Dark Knight. The Christopher Nolan sequel topped the box office for the second week in a row, taking in an estimated $75.6 million in its second weekend in release. It also set records for fastest to $200 million, $250 million and $300 million and it also set 5-day, 6-day, 7-day, 8-day, 9-day and 10-day records along with the record for the best opening week (Friday to Thursday. The film currently has an overall gross of $314.2 million.

Two newcomers made the top 10, but were severely overshadowed by The Dark Knight. Step Brothers, the new Will Ferrell/John C. Reilly comedy, took a distant second place with an estimated $30 million. The film is almost halfway to its $65 million budget and the film turned in a solid performance with a $9,696 per-screen average from 3.094 theaters. The other newbie didn't fare so well.

The X-Files: I Want to Believe opened in fourth place with an estimated $10.2 million, behind the holdover Mamma Mia!, still performing strongly with $17.8 million, just a 35.6% drop from last weekend's debut. The X-Files: I Want to Believe could only manage a $3,202 per-screen average from 3,185 theaters and it might even be a struggle to get to the break-even point of $30 million.

In limited release, one newbie fared decently amongst the blockbusters. Brideshead Revisited took in an estimated $332,000 from just 33 theaters, good for a solid $10,060 per-screen average. The film is set to expand to an estimated 225 theaters this coming weekend.

Next week sees the return of another popular franchise with The Mummy: Tomb of the Dragon Emperor along with Swing Vote in a semi-wide release. In limited release, the horror film Midnight Meat Train will hit select theaters.