| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Madagascar (2005) | £5,431,639 | £5,431,639 | £5,431,639 | new | 1 |
| 2 (1) |  | War of the Worlds (2005) | £2,223,949 | £4,332,060 | £21,900,630 | -47% | 3 |
| 3 (new) |  | Wedding Crashers (2005) | £2,182,597 | £2,182,597 | £2,182,597 | new | 1 |
| 4 (2) |  | Batman Begins (2005) | £422,489 | £935,057 | £14,806,311 | -46% | 5 |
| 5 (3) |  | The Descent (2005) | £411,667 | £862,105 | £1,432,955 | -28% | 2 |
| 6 (4) |  | Mr. & Mrs. Smith (2005) | £218,077 | £554,971 | £13,096,488 | -54% | 6 |
| 7 (new) |  | Maine Pyaar Kyun Kiya (2005) | £148,298 | £148,298 | £148,298 | new | 1 |
| 8 (5) |  | Star Wars Episode III: Revenge of the Sith (2005) | £81,973 | £200,754 | £39,078,654 | -51% | 9 |
| 9 (7) |  | Dus (2005) | £40,545 | £94,118 | £198,586 | -61% | 2 |
| 10 (new) | | Festival (2005) | £34,010 | £34,010 | £34,010 | new | 1 |
| 11 (8) |  | Kung-Fu Hustle (2005) | £24,661 | £106,020 | £1,238,813 | -70% | 4 |
| 12 (6) |  | A Lot Like Love (2005) | £24,215 | £143,470 | £1,423,831 | -80% | 4 |
| 13 (9) |  | Sin City (2005) | £22,061 | £92,935 | £7,004,229 | -66% | 7 |
| 14 (11) | | Sarkar (2005) | £16,076 | £35,258 | £150,646 | -49% | 3 |
| 15 (re) | | The Riddle (2005) | £13,448 | £13,448 | £527,467 | re | 1 |