“Forbidden Kingdom” debuted at No. 1 with $20.9 million in ticket sales, according to studio estimates Sunday. Look for more #1 debuts this weekend as “Forbidden Kingdom” opens worldwide.

Estimated ticket sales for Friday through Sunday at U.S. and Canadian theaters, according to Media By Numbers LLC. Final figures will be released Monday.

1. “The Forbidden Kingdom,” $20.9 million.

2. “Forgetting Sarah Marshall,” $17.3 million.

3. “Prom Night,” $9.1 million.

4. “88 Minutes,” $6.8 million.

5. “Nim’s Island,” $5.7 million.

6. “21,” $5.5 million.

7. “Street Kings,” $4 million.

8. “Dr. Seuss’ Horton Hears a Who!”, $3.5 million.

9. “Expelled: No Intelligence Allowed,” $3.1 million.

10. “Leatherheads,” $3 million.

See some behind the scenes footage from The Forbidden Kingdom: