Following are the top 10 movies at the North American box office for the weekend beginning on July 29, with "Cowboys & Aliens" and "The Smurfs" producing a tie for first place, according to studio estimates compiled on Sunday by Reuters.

1 (*) Cowboys & Aliens .................... $ 36.2 million

1 (*) The Smurfs .......................... $ 36.2 million

3 (1) Captain America: The First Avenger... $ 24.9 million

4 (2) Harry Potter: Deathly Hallows Pt. 2.. $ 21.9 million

5 (*) Crazy, Stupid, Love ................. $ 19.3 million

6 (3) Friends with Benefits ............... $ 9.3 million

7 (5) Horrible Bosses ..................... $ 7.1 million

8 (4) Transformers: Dark of the Moon....... $ 6.0 million

9 (6) Zookeeper ........................... $ 4.2 million

10 (5) Cars 2 .............................. $ 2.3 million

NOTES: Last weekend's rankings in parenthesis; (*) = new release.

CUMULATIVE TOTALS:

Transformers: Dark of the Moon ........... $ 337.9 million

Harry Potter: Deathly Hallows Pt. 2....... $ 318.5 million

Cars 2 ................................... $ 182.1 million

Captain America: The First Avenger ....... $ 116.8 million

Horrible Bosses .......................... $ 96.2 million

Zookeeper ................................ $ 68.7 million

Friends with Benefits .................... $ 38.2 million

Cowboys & Aliens ......................... $ 36.2 million

The Smurfs ............................... $ 36.2 million

Crazy, Stupid, Love ...................... $ 19.3 million

"Cowboys & Aliens" was released by Universal Pictures, a division of Comcast Corp. "The Smurfs," "Friends with Benefits" and "Zookeeper" were distributed by various units of Sony Corp. Time Warner Inc unit Warner Bros. released "Crazy, Stupid, Love," "Harry Potter and the Deathly Hallows -- Part 2" and "Horrible Bosses."

"Captain America: The First Avenger" and "Transformers: Dark of the Moon" were distributed by Paramount Pictures, a unit of Viacom Inc. "Cars 2" was released by Walt Disney Co.