| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | The Lord of the Rings: The Return of the King (2003) | £7,149,427 | £12,968,023 | £27,989,784 | -52% | 2 |
| 2 (new) |  | Peter Pan (2003) | £1,359,372 | £1,359,372 | £1,359,372 | new | 1 |
| 3 (3) |  | LoveActually (2003) | £979,412 | £1,793,690 | £29,665,315 | -25% | 6 |
| 4 (4) |  | Freaky Friday (2003) | £719,154 | £1,467,323 | £2,681,882 | -41% | 2 |
| 5 (2) |  | Elf (2003) | £542,274 | £2,154,941 | £14,369,541 | -61% | 5 |
| 6 (new) |  | Cold Mountain (2003) | £380,994 | £380,994 | £380,994 | new | 1 |
| 7 (new) |  | Out of Time (2003) | £311,508 | £311,508 | £311,508 | new | 1 |
| 8 (5) |  | Brother Bear (2003) | £263,763 | £834,423 | £3,429,501 | -49% | 4 |
| 9 (6) |  | S.W.A.T. (2003) | £220,355 | £220,355 | £4,579,787 | -45% | 4 |
| 10 (7) |  | Master and Commander: The Far Side of the World (2003) | £158,676 | £301,148 | £6,183,943 | -44% | 6 |
| 11 (8) |  | Good Boy! (2003) | £75,897 | £209,977 | £356,331 | -48% | 2 |
| 12 (10) |  | Kal Ho Naa Ho (2003) | £75,342 | £132,043 | £1,426,122 | -19% | 5 |
| 13 (9) | | Touching the Void (2003) | £63,110 | £106,401 | £411,986 | -35% | 3 |
| 14 (new) | | Loc Kargil (2003) | £57,269 | £57,269 | £57,269 | new | 1 |
| 15 (14) | | Munnabhai M.B.B.S. (2003) | £29,142 | £54,626 | £86,386 | -8% | 2 |