| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Harry Potter and the Half Blood Prince (2009) | £19,784,924 | £19,784,924 | £19,784,924 | new | 1 |
| 2 (2) |  | Ice Age: Dawn of the Dinosaurs (2009) | £2,849,981 | £4,879,167 | £20,300,698 | -40% | 3 |
| 3 (1) |  | Brüno (2009) | £2,301,432 | £5,357,266 | £10,357,495 | -54% | 2 |
| 4 (4) |  | The Hangover (2009) | £881,514 | £1,648,122 | £18,142,083 | -28% | 6 |
| 5 (3) |  | Transformers: Revenge of the Fallen (2009) | £678,743 | £1,339,814 | £24,919,977 | -53% | 5 |
| 6 (5) |  | Public Enemies (2009) | £470,651 | £1,118,843 | £5,728,410 | -55% | 3 |
| 7 (6) |  | My Sisters Keeper (2009) | £378,680 | £879,704 | £4,955,541 | -44% | 4 |
| 8 (new) |  | Moon (2009) | £157,867 | £157,867 | £157,867 | new | 1 |
| 9 (7) |  | Year One (2009) | £53,033 | £138,880 | £2,776,236 | -78% | 4 |
| 10 (8) |  | Night At the Museum 2 (2009) | £49,570 | £85,132 | £19,560,553 | -53% | 9 |
| 11 (9) | | Kambakkht Ishq (2009) | £33,601 | £86,408 | £637,702 | -68% | 3 |
| 12 (new) | | Burma Vj Reporter I Et Lukket Land (2008) | £31,522 | £31,522 | £31,522 | new | 1 |
| 13 (16) | | 35 Shots of Rum (2009) | £30,521 | £51,440 | £78,375 | 12% | 2 |
| 14 (10) | | Short Kut: The Con Is On (2009) | £23,901 | £63,438 | £143,926 | -70% | 2 |
| 15 (new) | | Frozen River (2009) | £18,594 | £18,594 | £18,594 | new | 1 |