Robin Williams, Ricky Gervais and Ben Stiller are laughing their way to the top of the U.S. box office - their new film Night at the Museum: Battle of the Smithsonian has toppled the competition in its opening weekend.

The comedians co-star with Amy Adams, Owen Wilson and Hank Azaria in the film, which took in $53.5 million over the Memorial Day weekend.

The win was a shock for movie reviewers, who insisted Terminator Salvation - the fourth movie in the sci-fi franchise - was poised to take the top spot after scooping more than $13 million on its first day of release. But the film came in at second with $43 million in earnings.

The new Star Trek movie followed at third, with nearly $22 million in earnings and now boasting a three-week total of $183.6 million.

Rounding out the top five are Tom Hanks' Angels and Demons and new comedy spoof Dance Flick, which took in $21.4 million and $11.1 million respectively.

Night at the Museum: Battle of the Smithsonian Gallery

(This news article provided by World Entertainment News Network)