Box Office: April 18-20, 2008

The martial arts masters ruled supreme at the box office this weekend, while Smart People barely clocked in at No. 12. Amazing that Dr. Seuss is still hanging in there, even though it’s been in theaters for many weeks. Here are the stats from Box Office Mojo:

1-The Forbidden Kingdom, $21.40M

2-Forgetting Sarah Marshall, $17.72M

3-Prom Night, $8.67M

4-88 Minutes, $6.95M

5-Nim’s Island, $5.68M

6-21, $5.52M

7-Street Kings, $4.17M

8-Dr. Seuss’ Horton Hears a Who, $3.51M

9-Leatherheads, $3.04M

10-Expelled: No Intelligence Allowed, $2.97M

11-Superhero Movie, $1.60M

12-Smart People, $1.60M

Image: The Forbidden Kingdom, Lionsgate, 2008