| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Pirates of the Caribbean: The Curse of the Black Pearl (2003) | £3,765,450 | £3,765,450 | £3,765,450 | new | 1 |
| 2 (1) |  | Terminator 3: Rise of the Machines (2003) | £2,246,627 | £5,319,593 | £11,399,962 | -63% | 2 |
| 3 (2) |  | Legally Blonde 2: Red, White & Blonde (2003) | £576,033 | £1,589,585 | £3,136,068 | -63% | 2 |
| 4 (3) |  | Spy Kids 3D: Game Over (2003) | £560,170 | £1,435,433 | £2,414,807 | -43% | 2 |
| 5 (new) |  | Rugrats Go Wild (2003) | £360,005 | £360,005 | £360,005 | new | 1 |
| 6 (new) |  | What a Girl Wants (2003) | £220,217 | £220,217 | £220,217 | new | 1 |
| 7 (7) |  | Piglets Big Movie (2003) | £195,370 | £481,159 | £2,974,851 | -43% | 7 |
| 8 (4) |  | Bruce Almighty (2003) | £185,391 | £520,332 | £23,043,999 | -62% | 7 |
| 9 (new) |  | Koi... Mil Gaya (2003) | £177,100 | £177,100 | £177,100 | new | 1 |
| 10 (5) |  | Veronica Guerin (2003) | £166,402 | £389,925 | £2,404,947 | -52% | 5 |
| 11 (9) |  | Sinbad Legend of the Seven Seas (2003) | £94,165 | £303,049 | £2,128,863 | -67% | 3 |
| 12 (8) |  | Charlie's Angels: Full Throttle (2003) | £79,489 | £283,868 | £12,109,789 | -72% | 6 |
| 13 (6) |  | Hulk (2003) | £65,310 | £309,700 | £8,172,009 | -81% | 4 |
| 14 (10) |  | Daddy Day Care (2003) | £59,785 | £266,139 | £5,040,678 | -76% | 5 |
| 15 (new) |  | Respiro Grazias Island (2003) | £52,327 | £52,327 | £52,327 | new | 1 |