| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (2) |  | Calendar Girls (2003) | £1,761,985 | £3,813,531 | £9,493,214 | -5% | 3 |
| 2 (1) |  | The Italian Job (2003) | £1,475,081 | £2,303,671 | £4,597,698 | -36% | 2 |
| 3 (3) |  | Underworld (2003) | £868,821 | £1,577,815 | £3,065,654 | -42% | 2 |
| 4 (new) |  | Once Upon a Time In Mexico (2003) | £846,100 | £846,100 | £846,100 | new | 1 |
| 5 (4) |  | Pirates of the Caribbean: The Curse of the Black Pearl (2003) | £776,424 | £1,155,027 | £25,851,024 | -12% | 8 |
| 6 (new) |  | Matchstick Men (2003) | £647,483 | £647,483 | £647,483 | new | 1 |
| 7 (5) |  | American Pie: The Wedding (2003) | £264,198 | £480,372 | £16,676,226 | -35% | 7 |
| 8 (new) | | Young Adam (2003) | £228,692 | £228,692 | £228,692 | new | 1 |
| 9 (new) |  | Ned Kelly (2003) | £211,643 | £211,643 | £211,643 | new | 1 |
| 10 (7) |  | Spy Kids 3D: Game Over (2003) | £177,845 | £189,153 | £6,863,494 | 2% | 9 |
| 11 (8) |  | The Lizzie Mcguire Movie (2003) | £142,186 | £152,724 | £1,623,733 | -13% | 5 |
| 12 (10) |  | Spirited Away (2001) | £103,065 | £174,222 | £542,530 | -19% | 3 |
| 13 (6) |  | Jeepers Creepers 2 (2003) | £91,033 | £174,379 | £3,466,989 | -51% | 5 |
| 14 (11) |  | interMission (2003) | £89,621 | £181,391 | £1,220,992 | -29% | 5 |
| 15 (14) |  | Rugrats Go Wild (2003) | £78,896 | £84,069 | £3,044,715 | -12% | 7 |