This weekend at the box office

“National Treasure: Book of Secrets” and “Alvin and the Chipmunks” are expected to battle it out for the weekend’s No. 1 ranking at the box office, and the comedy “Juno” could continue climbing up the charts. Along with the films listed below, contenders to make the top 10 include “Aliens vs. Predator: Requiem,” “Enchanted” and “Atonement.” These figures are Times predictions only. Studios will issue preliminary estimates Sunday and final results Monday.

Movie (studio): 1. National Treasure: Book of Secrets (Disney)

3-day prediction (millions): $17.0

Projected total (millions): $174.0

Weeks: 3

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Movie (studio): 2. Alvin and the Chipmunks (20th Century Fox)

3-day prediction (millions): $15.0

Projected total (millions): $184.0

Weeks: 4

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Movie (studio): 3. Juno (Fox Searchlight)

3-day prediction (millions): $11.5

Projected total (millions): $47.0

Weeks: 5

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Movie (studio): 4. I Am Legend (Warner Bros.)

3-day prediction (millions): $10.5

Projected total (millions): $226.5

Weeks: 4

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Movie (studio): 5. Charlie Wilson’s War (Universal)

3-day prediction (millions): $7.0

Projected total (millions): $55.0

Weeks: 3

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Movie (studio): 6. P.S. I Love You (Warner Bros.)

3-day prediction (millions): $6.5

Projected total (millions): $35.5

Weeks: 3

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Movie (studio): 7. One Missed Call (Warner Bros.)

3-day prediction (millions): $6.0

Projected total (millions): $6.0

Weeks: 1

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Movie (studio): 8. The Water Horse (Sony)

3-day prediction (millions): $5.0

Projected total (millions): $25.0

Weeks: 2

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Movie (studio): 9. Sweeney Todd (DreamWorks/Paramount)

3-day prediction (millions): $4.5

Projected total (millions): $37.5

Weeks: 3

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Movie (studio): 10. The Great Debaters (Weinstein/MGM)

3-day prediction (millions): $4.0

Projected total (millions): $22.0

Weeks: 2

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Source: Times research

Los Angeles Times