| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Star Wars Episode III: Revenge of the Sith (2005) | £14,361,469 | £14,361,469 | £14,361,469 | new | 1 |
| 2 (2) |  | Monster-in-Law (2005) | £1,138,777 | £1,777,714 | £3,090,393 | -13% | 2 |
| 3 (1) |  | Kingdom of Heaven (2005) | £644,087 | £1,310,408 | £6,370,146 | -54% | 3 |
| 4 (3) |  | The Hitchhikers Guide to the Galaxy (2005) | £513,991 | £935,748 | £9,618,055 | -50% | 4 |
| 5 (4) |  | The Interpreter (2005) | £191,900 | £337,162 | £6,874,069 | -37% | 6 |
| 6 (6) |  | The Wedding Date (2005) | £134,253 | £260,587 | £3,769,361 | -49% | 5 |
| 7 (8) |  | The Jacket (2005) | £120,735 | £235,517 | £411,290 | -31% | 2 |
| 8 (5) |  | xXx 2: The Next Level (2005) | £107,571 | £191,375 | £2,624,858 | -59% | 4 |
| 9 (7) |  | The Amityville Horror (2005) | £97,620 | £470,815 | £5,300,825 | -46% | 6 |
| 10 (9) |  | A Good Woman (2005) | £96,428 | £208,065 | £338,258 | -26% | 2 |
| 11 (11) |  | Valiant (2005) | £88,275 | £95,852 | £8,092,878 | -18% | 9 |
| 12 (10) | | Seed of Chucky (2004) | £65,600 | £117,727 | £226,837 | -40% | 2 |
| 13 (14) |  | Robots (2005) | £58,346 | £60,938 | £12,142,090 | -21% | 10 |
| 14 (12) |  | Ong-Bak (2003) | £47,880 | £112,946 | £214,580 | -53% | 2 |
| 15 (new) |  | Mysterious Skin (2005) | £39,382 | £39,382 | £39,382 | new | 1 |