| pos. | Title | Gross | |
|---|---|---|---|
| 1 |  | Finding Nemo (2003) | £37,178,973 |
| 2 |  | The Matrix Reloaded (2003) | £32,510,686 |
| 3 |  | The Lord of the Rings: The Two Towers (2002) | £30,950,884 |
| 4 |  | LoveActually (2003) | £29,665,315 |
| 5 |  | Pirates of the Caribbean: The Curse of the Black Pearl (2003) | £28,067,590 |
| 6 |  | The Lord of the Rings: The Return of the King (2003) | £27,989,784 |
| 7 |  | Bruce Almighty (2003) | £23,372,048 |
| 8 |  | X-Men 2 (2003) | £22,750,294 |
| 9 |  | Calendar Girls (2003) | £20,174,133 |
| 10 |  | Johnny English (2003) | £19,209,597 |
| 11 |  | Terminator 3: Rise of the Machines (2003) | £18,789,175 |
| 12 |  | The Matrix Revolutions (2003) | £17,754,338 |
| 13 |  | American Pie: The Wedding (2003) | £16,921,876 |
| 14 |  | Chicago (2003) | £15,998,332 |
| 15 |  | Catch Me If You Can (2003) | £14,622,101 |
| 16 |  | Elf (2003) | £14,369,541 |
| 17 |  | Two Weeks Notice (2002) | £13,255,520 |
| 18 |  | 8 Mile (2002) | £12,974,253 |
| 19 |  | Charlie's Angels: Full Throttle (2003) | £12,109,789 |
| 20 |  | Kill Bill Volume 1 (2003) | £11,453,044 |