All totals are U.S. box office only. SF and genre-related films in bold.

Title (Studio)….Weekend Box Office….Engagements….Total Gross Since Release

1 Iron Man (Paramount)….$98,618,668….4,105….$102,118,668

2 Made of Honor (Sony)….$14,756,850….2,729….$14,756,850

3 Baby Mama (Universal)….$10,065,010….2,548….$32,062,480

4 Harold and Kumar Escape from Guantanamo Bay (New Line)….$6,114,373….2,545….$25,369,337

5 Forgetting Sarah Marshall (Universal)….$6,059,920….2,872….$44,732,340

6 The Forbidden Kingdom (Lions Gate)….$4,187,897….2,960….$45,112,303

7 Nim’s Island (Fox)….$2,677,543….2,478….$42,471,660

8. Prom Night (Screen Gems)….$2,403,313….2,434….$41,350,731

9. 21 (Sony)….$2,002,471….2,242….78,959,237

10. 88 Minutes (Sony)….$1,545,084….1,765….$15,368,925

Source: Rentrak