| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Burn After Reading (2008) | £2,045,565 | £2,045,565 | £2,045,565 | new | 1 |
| 2 (new) |  | Eagle Eye (2008) | £1,096,777 | £1,096,777 | £1,096,777 | new | 1 |
| 3 (re) |  | Igor (2008) | £981,750 | £981,750 | £1,110,859 | RE | 1 |
| 4 (1) |  | The House Bunny (2008) | £664,306 | £1,077,550 | £1,971,738 | -26% | 2 |
| 5 (2) |  | Mirrors (2008) | £585,350 | £1,084,473 | £1,918,565 | -30% | 2 |
| 6 (4) |  | Taken (2008) | £530,578 | £998,296 | £5,525,386 | -33% | 4 |
| 7 (3) |  | How to Lose Friends and Alienate People (2008) | £442,051 | £930,655 | £3,550,581 | -46% | 3 |
| 8 (7) |  | Mamma Mia! (2008) | £427,658 | £735,074 | £65,932,575 | -11% | 15 |
| 9 (6) |  | City of Ember (2008) | £284,899 | £472,924 | £969,833 | -43% | 2 |
| 10 (5) |  | Tropic Thunder (2008) | £273,070 | £628,019 | £8,387,745 | -50% | 5 |
| 11 (new) | | The Rocker (2008) | £217,745 | £217,745 | £217,745 | new | 1 |
| 12 (8) |  | The Boy In the Striped Pajamas (2008) | £199,348 | £412,440 | £3,739,689 | -33% | 6 |
| 13 (11) |  | Gomorrah (2008) | £137,012 | £270,462 | £441,810 | -20% | 2 |
| 14 (12) |  | Fly Me to the Moon 3D (2008) | £111,647 | £163,366 | £672,986 | -26% | 3 |
| 15 (15) |  | Il Y a Longtemps Que Je Taime (2008) | £73,355 | £157,101 | £737,805 | -33% | 4 |