British Box Office For September 2003
| Rank | Release | Gross | Theaters | Total Gross | Release Date | Distributor |
|---|---|---|---|---|---|---|
| 1 | Calendar Girls | $15,743,307 | 462 | $35,807,288 | Sep 5 | - |
| 2 | Pirates of the Caribbean: The Curse of the Black Pearl | $13,552,802 | 457 | $47,801,332 | Aug 8 | - |
| 3 | The Italian Job | $7,624,706 | 428 | $12,879,003 | Sep 19 | - |
| 4 | American Wedding | $7,531,330 | 432 | $27,826,516 | Aug 15 | - |
| 5 | Underworld | $5,084,003 | 350 | $7,339,819 | Sep 19 | - |
| 6 | Jeepers Creepers 2 | $4,064,171 | 341 | $5,749,567 | Aug 29 | - |
| 7 | Terminator 3: Rise of the Machines | $3,439,913 | 478 | $31,289,575 | Aug 1 | - |
| 8 | Lara Croft: Tomb Raider - The Cradle of Life | $3,070,936 | 449 | $8,660,559 | Aug 22 | - |
| 9 | Spy Kids 3: Game Over | $2,250,077 | 420 | $12,047,855 | Aug 1 | - |
| 10 | The Lizzie McGuire Movie | $1,907,321 | 330 | $2,985,402 | Aug 22 | - |
| 11 | Intermission | $1,794,405 | 101 | $3,640,164 | Aug 29 | - |
| 12 | Once Upon a Time in Mexico | $1,403,151 | 315 | $4,426,636 | Sep 26 | - |
| 13 | Tears of the Sun | $1,189,921 | 297 | $1,350,756 | Sep 12 | - |
| 14 | Blackball | $1,175,155 | 304 | $1,175,155 | Sep 5 | - |
| 15 | Rugrats Go Wild | $1,151,639 | 370 | $5,358,218 | Aug 8 | - |
| 16 | Matchstick Men | $1,074,367 | 313 | $2,235,422 | Sep 19 | - |
| 17 | Spirited Away | $899,718 | 51 | $1,383,023 | Sep 12 | - |
| 18 | Camp | $897,861 | 215 | $897,861 | Sep 5 | - |
| 19 | Hollywood Homicide | $880,728 | 291 | $1,436,217 | Aug 29 | - |
| 20 | The Triplets of Belleville | $863,209 | 60 | $863,209 | Sep 5 | - |
| 21 | The Man Who Sued God 2003 Re-release | $733,679 | 164 | $1,560,867 | Aug 22 | - |
| 22 | Confidence | $537,184 | 251 | $1,844,828 | Aug 22 | - |
| 23 | The Order | $483,263 | 160 | $483,263 | Sep 12 | - |
| 24 | Freddy vs. Jason | $415,834 | 256 | $4,448,904 | Aug 15 | - |
| 25 | Young Adam | $379,267 | 133 | $1,135,673 | Sep 26 | - |
| 26 | The Divorce | $353,169 | 75 | $353,169 | Sep 19 | - |
| 27 | Ned Kelly | $350,983 | 213 | $847,674 | Sep 26 | - |
| 28 | Piglet's Big Movie | $263,269 | 416 | $6,922,153 | Jun 27 | - |
| 29 | Kuch Naa Kaho | $261,967 | 29 | $261,967 | Sep 5 | - |
| 30 | Swimming Pool | $240,616 | 42 | $779,636 | Aug 22 | - |
| 31 | Raising Victor Vargas | $200,542 | 23 | $200,542 | Sep 19 | - |
| 32 | Gigli | $24,352 | - | $24,352 | Sep 26 | - |
