| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Mr. & Mrs. Smith (2005) | £3,943,422 | £3,943,422 | £3,943,422 | new | 1 |
| 2 (1) |  | Star Wars Episode III: Revenge of the Sith (2005) | £1,598,734 | £2,752,834 | £35,417,944 | -52% | 4 |
| 3 (2) |  | Sin City (2005) | £1,027,813 | £2,198,607 | £4,650,906 | -58% | 2 |
| 4 (3) |  | The Pacifier (2005) | £384,705 | £581,264 | £3,385,666 | -54% | 3 |
| 5 (6) |  | House of Wax (2005) | £253,036 | £485,153 | £2,531,815 | -53% | 3 |
| 6 (5) |  | Monster-in-Law (2005) | £240,094 | £439,596 | £5,906,624 | -56% | 5 |
| 7 (4) |  | The League of Gentlemens Apocalypse (2005) | £234,491 | £476,053 | £1,032,049 | -58% | 2 |
| 8 (7) |  | Millions (1991) | £119,592 | £207,490 | £1,246,506 | -58% | 3 |
| 9 (new) |  | A Married Woman (2005) | £115,286 | £115,286 | £115,286 | new | 1 |
| 10 (8) |  | Kingdom of Heaven (2005) | £62,205 | £146,183 | £7,623,559 | -64% | 6 |
| 11 (11) |  | Bunty Aur Babli (2005) | £49,241 | £89,514 | £473,869 | -49% | 3 |
| 12 (9) |  | The Hitchhikers Guide to the Galaxy (2005) | £47,554 | £95,904 | £10,563,392 | -64% | 7 |
| 13 (13) | | The Consequences of Love (2005) | £29,317 | £54,270 | £201,521 | -40% | 3 |
| 14 (12) |  | Valiant (2005) | £26,339 | £33,237 | £8,430,974 | -68% | 12 |
| 15 (10) | | It's All Gone Pete Tong (2005) | £21,224 | £79,706 | £752,867 | -84% | 3 |