Final numbers will be counted Monday.
Last weekend's top movie, "Captain America: The First Avenger," slipped to No. 3 with $24.9 million.
The top 10 movies of the weekend were:
1 (tie). "Cowboys & Aliens," $36.2 million.
1 (tie). "The Smurfs," $36.2 million.
3. "Captain America: The First Avenger," $24.9 million ($48.5
million international).
4. "Harry Potter and the Deathly Hallows: Part 2," $21.9
million.
5. "Crazy, Stupid, Love," $19.3 million.
6. "Friends with Benefits," $9.3 million.
7. "Horrible Bosses," $7.1 million.
8. "Transformers: Dark of the Moon," $6 million ($42 million
international).
9. "Zookeeper," $4.2 million.
10. "Cars 2," $2.3 million ($30 million international).
The Associated Press contributed to this report.
