Following are the top 10 movies at the North American box office for the weekend beginning on Sept. 9, with thriller Contagion in the No. 1 spot, according to studio estimates compiled on Sunday by Reuters.

1 (*) Contagion .............$ 23.1 million

2 (1) The Help ..............$ 8.7 million

3 (*) Warrior ...............$ 5.6 million

4 (2) The Debt ..............$ 4.9 million

5 (6) Colombiana ............$ 4.0 million

6 (5) Rise of the Planet of the Apes .......$ 3.9 million

7 (4) Shark Night (3-D) .....$ 3.5 million

8 (3) Apollo 18 .............$ 2.9 million

9 (7) Our Idiot Brother .....$ 2.8 million

10 (8) Spy Kids: All the Time in the World...$ 2.5 million

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

CUMULATIVE TOTALS:

Rise of the Planet of the Apes ............$ 167.8 million

The Help ....$ 137.1 million

Spy Kids: All the Time in the World .......$ 34.2 million

Colombiana ..$ 29.8 million

Contagion ...$ 23.1 million

The Debt ....$ 22.0 million

Our Idiot Brother ..........$ 21.4 million

Apollo 18 ...$ 15.0 million

Shark Night (3-D) ..........$ 14.8 million

Warrior .....$ 5.6 million

Warner Bros., a unit of Time Warner Inc (TWX.N), released Contagion.

The Help was produced by DreamWorks and distributed by Walt Disney Co (DIS.N). The Debt was released by Focus Features, a unit of Comcast Corp's (CMCSA.O) Universal Pictures.

Lions Gate Entertainment (LGF.N) released Warrior.

Privately held Relativity Media released Shark Night 3D in the United States and eOne distributed the film in Canada.

Rise of the Planet of the Apes was released by 20th Century Fox, a unit of News Corp (NWSA.O).

The privately held Weinstein Co released Apollo 18, Our Idiot Brother and Spy Kids: All the Time in the World.

Colombiana was distributed by units of Sony Corp (6758.T) (SNE.N).