| Rank | LW | Release
| Gross | %± LW | Theaters | Change | Average | Total Gross | Weeks | Distributor
| New This Week
| Estimated
|
|---|
| 1 | 1 | Enchanted | $225,008 | -44.9% | 50 | +14 | $4,500 | $777,429 | 2 | Walt Disney Pictures | false | false |
| 2 | - | American Gangster | $143,550 | - | 55 | - | $2,610 | $143,550 | 1 | United International Pictures | true | false |
| 3 | - | Sweeney Todd: The Demon Barber of Fleet Street | $140,678 | - | 60 | - | $2,344 | $152,381 | 1 | Warner Bros. | true | false |
| 4 | - | Siyama | $108,906 | - | 52 | - | $2,094 | $108,906 | 1 | N/A | true | false |
| 5 | - | First Flight | $69,042 | - | 53 | - | $1,302 | $69,042 | 1 | RS Film & Distribution | true | false |
| 6 | 4 | Busaba Bold & Beautiful | $46,682 | -54.4% | 52 | -6 | $897 | $174,139 | 2 | Pranakorn Films | false | false |
| 7 | 3 | The Flock | $44,831 | -62.8% | 46 | -4 | $974 | $198,328 | 2 | Mongkol Major | false | false |
| 8 | 2 | Cloverfield | $38,492 | -74.9% | 68 | -18 | $566 | $880,626 | 3 | United International Pictures | false | false |
| 9 | 5 | Mam diaw hua liam hua laem | $22,563 | -67.6% | 38 | -17 | $593 | $959,614 | 4 | Mongkol Film Company | false | false |
| 10 | - | Martian Child | $21,806 | - | 15 | - | $1,453 | $21,806 | 1 | Mongkol Major | true | false |
| 11 | 8 | Le Grand Chef | $19,293 | -41.4% | 17 | -3 | $1,134 | $64,121 | 2 | M Pictures | false | false |
| 12 | 6 | Saw IV | $14,059 | -72.5% | 27 | -18 | $520 | $211,265 | 3 | N/A | false | false |
| 13 | 7 | Hitman | $8,088 | -81% | 16 | -42 | $505 | $876,868 | 4 | 20th Century Fox International | false | false |
| 14 | - | Atonement | $5,955 | - | 12 | - | $496 | $5,955 | - | United International Pictures | - | false |
| 15 | 9 | Mr. Magorium's Wonder Emporium | $5,278 | -82.3% | 10 | -15 | $527 | $149,919 | 3 | Mongkol Major | false | false |
| 16 | 14 | Across the Universe | $2,701 | -29.6% | 1 | - | $2,701 | $38,123 | 5 | N/A | false | false |
| 17 | 16 | Beowulf | $2,477 | +38% | 1 | - | $2,477 | $1,481,840 | 12 | Warner Bros. | false | false |
| 18 | 10 | Eastern Promises | $1,927 | -69.4% | 4 | -2 | $481 | $29,406 | 3 | M Pictures | false | false |
| 19 | 13 | Elizabeth: The Golden Age | $1,167 | -77.8% | 5 | -7 | $233 | $186,195 | 5 | N/A | false | false |
| 20 | 15 | Inugami-ke no ichizoku 2008 Re-release | $467 | -82.4% | 1 | -1 | $467 | $27,099 | 4 | M Pictures | false | false |
| 21 | 11 | National Treasure: Book of Secrets | $307 | -94.3% | 1 | -12 | $307 | $2,696,573 | 7 | Walt Disney Pictures | false | false |
| 22 | 20 | Lust, Caution | $110 | -62.8% | 1 | - | $110 | $48,663 | 11 | Walt Disney Pictures | false | false |
