The top movies at the North American box office

LOS ANGELES (Reuters) - Following are the top 10 films at the North American box office for the three-day weekend beginning on April 25, led by the new release "Baby Mama," according to studio estimates compiled on Sunday by Reuters.

1 (*) Baby Mama ....... $18.3 million

2 (*) Harold and Kumar

Escape from Guantanamo Bay ..... $14.6 million

3 (1) The Forbidden Kingdom .......... $11.2 million

4 (2) Forgetting Sarah Marshall ...... $11.0 million

5 (5) Nim's Island .... $ 4.5 million

6 (3) Prom Night ...... $ 4.4 million

7 (6) 21 .............. $ 4.0 million