| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | X-Men 2 (2003) | £3,079,985 | £6,473,943 | £13,511,804 | -56% | 2 |
| 2 (new) |  | Old School (2003) | £742,478 | £742,478 | £742,478 | new | 1 |
| 3 (2) |  | Johnny English (2003) | £713,416 | £1,397,119 | £16,989,316 | -41% | 5 |
| 4 (new) |  | Darkness Falls (2003) | £483,739 | £483,739 | £483,739 | new | 1 |
| 5 (3) |  | How to Lose a Guy In 10 Days (2003) | £474,990 | £965,308 | £5,537,385 | -37% | 4 |
| 6 (4) |  | Phone Booth (2003) | £464,682 | £887,590 | £5,475,639 | -33% | 4 |
| 7 (new) |  | Hope Springs (2003) | £366,352 | £366,352 | £366,352 | new | 1 |
| 8 (5) |  | The Jungle Book 2 (2003) | £257,873 | £550,692 | £7,354,022 | -43% | 5 |
| 9 (new) |  | I Capture the Castle (2003) | £138,142 | £138,142 | £138,142 | new | 1 |
| 10 (7) |  | Welcome to Collinwood (2003) | £129,317 | £333,942 | £1,630,316 | -60% | 3 |
| 11 (6) |  | Dreamcatcher (2003) | £128,615 | £355,498 | £1,752,472 | -63% | 3 |
| 12 (8) |  | S Club Seeing Double (2003) | £74,071 | £152,327 | £2,169,909 | -42% | 5 |
| 13 (9) |  | 25th Hour (2003) | £57,480 | £150,840 | £586,967 | -54% | 3 |
| 14 (10) |  | Bulletproof Monk (2003) | £40,010 | £128,660 | £2,009,003 | -68% | 4 |
| 15 (14) |  | The Leopard (2003) | £36,470 | £73,227 | £112,329 | -7% | 2 |