Ben Stiller comedy ends the four week unquestioned supremacy of “The Dark Knight” at the North American box office.

“Tropic Thunder,” that also stars Ben Stiller and Jack Black, grossed $26 million during its first weekend in U.S. and Canadian theaters, bringing its five-day estimated total from Wednesday's opening to $37 million. In the movie Downey, Stiller and Black star as narcissistic Hollywood actors caught up in a real-life battle with narco-terrorists while filming a war movie in Southeast Asia. The film is directed, co-written and co-produced by Stiller.

Still, Dark Knight’s weekend collection of $16.7 million brought its total earnings to $471.5 million, sufficient to surpass 1977’s Star Wars’ total of $460 million to become the second-highest grossing movie of all time.

Warner Bros’. Star Wars: The Clone Wars, grossed an estimated $15.5 million for the third spot in the weekend rankings.

The weekend’s only other wide release, an American remake of the South Korean horror film “Mirrors”, starring Kiefer Sutherland of the hit TV series “24”, grossed $11.1 million to land at No. 4.

Last week’s runner-up at the box office, “Pineapple Express”, fell to No. 5 with $10 million, a drop-off of nearly 60 percent from its opening tally.