| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | LoveActually (2003) | £4,660,595 | £8,465,114 | £15,122,593 | -30% | 2 |
| 2 (new) |  | Elf (2003) | £4,538,440 | £4,538,440 | £4,538,440 | new | 1 |
| 3 (12) |  | Master and Commander: The Far Side of the World (2003) | £1,845,125 | £1,878,553 | £1,939,609 | 97% | 2 |
| 4 (2) |  | The Matrix Revolutions (2003) | £635,684 | £1,156,725 | £16,737,730 | -45% | 4 |
| 5 (3) |  | Finding Nemo (2003) | £490,875 | £691,122 | £36,685,712 | -39% | 8 |
| 6 (new) |  | Kal Ho Naa Ho (2003) | £436,790 | £436,790 | £436,790 | new | 1 |
| 7 (4) |  | Seabiscuit (2003) | £145,389 | £321,892 | £2,846,751 | -57% | 4 |
| 8 (5) |  | Kill Bill Volume 1 (2003) | £126,197 | £280,836 | £11,252,063 | -51% | 8 |
| 9 (re) |  | interMission (2003) | £120,419 | £120,419 | £1,829,501 | RE | 7 |
| 10 (new) | | Spin the Bottle (2003) | £95,533 | £95,533 | £95,533 | new | 1 |
| 11 (6) |  | Intolerable Cruelty (2003) | £95,412 | £228,796 | £6,465,278 | -61% | 6 |
| 12 (9) | | In America (2003) | £70,186 | £156,611 | £1,764,800 | -55% | 5 |
| 13 (7) |  | The Texas Chainsaw Massacre (2003) | £69,502 | £174,936 | £3,860,962 | -62% | 5 |
| 14 (8) |  | The League of Extraordinary Gentlemen (2003) | £60,375 | £128,405 | £7,319,844 | -62% | 7 |
| 15 (10) |  | Calendar Girls (2003) | £55,681 | £163,241 | £20,174,133 | -50% | 12 |