| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | The Matrix Reloaded (2003) | £2,485,938 | £4,682,294 | £26,660,495 | -34% | 3 |
| 2 (new) |  | Anger Management (2003) | £1,768,335 | £1,768,335 | £1,768,335 | new | 1 |
| 3 (2) |  | Bringing Down the House (2003) | £753,235 | £1,250,256 | £2,383,395 | -34% | 2 |
| 4 (new) |  | The Hunted (2003) | £394,122 | £394,122 | £394,122 | new | 1 |
| 5 (3) |  | X-Men 2 (2003) | £332,741 | £564,366 | £20,105,363 | -27% | 6 |
| 6 (4) |  | Kangaroo Jack (2003) | £258,814 | £378,055 | £2,754,723 | -17% | 4 |
| 7 (5) |  | Ripleys Game (2003) | £197,249 | £388,127 | £632,584 | -19% | 2 |
| 8 (6) |  | Johnny English (2003) | £152,589 | £234,102 | £19,064,424 | -16% | 9 |
| 9 (10) | | Secretary (2003) | £85,615 | £164,306 | £731,693 | 7% | 4 |
| 10 (8) |  | The Jungle Book 2 (2003) | £69,634 | £92,961 | £8,171,735 | -21% | 9 |
| 11 (15) |  | I Capture the Castle (2003) | £51,089 | £108,845 | £725,775 | 13% | 5 |
| 12 (9) |  | How to Lose a Guy In 10 Days (2003) | £47,942 | £114,586 | £6,770,959 | -42% | 8 |
| 13 (12) |  | Phone Booth (2003) | £37,544 | £101,020 | £6,609,312 | -46% | 8 |
| 14 (7) |  | Old School (2003) | £37,030 | £110,337 | £2,227,040 | -59% | 5 |
| 15 (new) | | From the Depths of Dark Water (2003) | £34,978 | £34,978 | £34,978 | new | 1 |