| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | X-Men 2 (2003) | £2,115,011 | £3,236,337 | £16,748,141 | -31% | 3 |
| 2 (new) |  | Kangaroo Jack (2003) | £764,917 | £764,917 | £764,917 | new | 1 |
| 3 (3) |  | Johnny English (2003) | £592,585 | £816,381 | £17,805,697 | -17% | 6 |
| 4 (2) |  | Old School (2003) | £488,877 | £792,254 | £1,534,732 | -34% | 2 |
| 5 (4) |  | Darkness Falls (2003) | £426,853 | £652,352 | £1,136,091 | -12% | 2 |
| 6 (5) |  | How to Lose a Guy In 10 Days (2003) | £372,437 | £609,775 | £6,147,160 | -22% | 5 |
| 7 (6) |  | Phone Booth (2003) | £364,493 | £583,966 | £6,059,605 | -22% | 5 |
| 8 (8) |  | The Jungle Book 2 (2003) | £246,896 | £283,259 | £7,637,281 | -4% | 6 |
| 9 (7) |  | Hope Springs (2003) | £230,090 | £438,786 | £805,138 | -37% | 2 |
| 10 (new) | | The Actors (2003) | £226,860 | £226,860 | £226,860 | new | 1 |
| 11 (new) | | Secretary (2003) | £165,318 | £165,318 | £165,318 | new | 1 |
| 12 (9) |  | I Capture the Castle (2003) | £114,758 | £219,020 | £357,162 | -17% | 2 |
| 13 (new) |  | Armaan (2003) | £111,124 | £111,124 | £111,124 | new | 1 |
| 14 (new) |  | The Truth About Charlie (2003) | £81,944 | £81,944 | £81,944 | new | 1 |
| 15 (new) |  | Antwone Fisher (2003) | £59,976 | £59,976 | £59,976 | new | 1 |