Rank	Title	Distributor	Weekend Gross	Cumulative Gross	Release Weeks	Number of Theaters
1	The Dark Knight	Warner Bros.	$43,800,000	$394,887,000	3	4,266
2	The Mummy: Tomb of the Dragon Emperor	Universal	$42,450,400	$42,450,400	1	3,760
3	Step Brothers	Sony	$16,300,000	$62,966,000	2	3,094
4	Mamma Mia!	Universal	$13,120,670	$87,975,280	3	3,062
5	Journey to the Center of the Earth	Warner Bros.	$6,875,000	$73,140,000	4	2,285
6	Swing Vote	Walt Disney	$6,300,000	$6,300,000	1	2,213
7	Hancock	Sony	$5,200,000	$215,995,000	5	2,782
8	WALL-E	Walt Disney	$4,747,000	$204,222,000	6	2,555
9	The X-Files: I Want to Believe	Fox	$3,425,000	$17,060,495	2	3,185
10	Space Chimps	Fox	$2,840,000	$22,090,839	3	2,134
11	Hellboy II: The Golden Army	Universal	$2,527,110	$71,272,920	4	1,959
12	Wanted	Universal	$1,257,475	$131,337,590	6	895