| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Pineapple Express (2008) | £1,372,911 | £1,372,911 | £1,372,911 | new | 1 |
| 2 (2) |  | Mamma Mia! (2008) | £1,059,102 | £2,453,524 | £60,141,174 | -26% | 10 |
| 3 (1) |  | Rocknrolla (2008) | £910,485 | £1,800,640 | £3,366,079 | -42% | 2 |
| 4 (new) |  | The Women (2008) | £865,310 | £865,310 | £865,310 | new | 1 |
| 5 (3) |  | The Duchess (2008) | £844,020 | £2,052,410 | £3,454,610 | -40% | 2 |
| 6 (4) |  | Step Brother's (2008) | £625,575 | £1,242,397 | £5,245,671 | -43% | 3 |
| 7 (5) |  | Disaster Movie (2008) | £589,012 | £843,051 | £1,768,706 | -36% | 2 |
| 8 (new) |  | The Boy In the Striped Pajamas (2008) | £513,653 | £513,653 | £513,653 | new | 1 |
| 9 (6) |  | The Strangers (2008) | £407,301 | £785,205 | £3,634,258 | -45% | 3 |
| 10 (7) |  | The Dark Knight (2008) | £355,239 | £1,222,754 | £47,641,230 | -39% | 8 |
| 11 (8) |  | Hellboy II: The Golden Army (2008) | £222,807 | £426,473 | £7,199,409 | -56% | 4 |
| 12 (new) |  | Eden Lake (2008) | £192,027 | £192,027 | £192,027 | new | 1 |
| 13 (11) |  | WALL•E (2008) | £158,064 | £195,074 | £22,229,636 | -43% | 9 |
| 14 (9) |  | Get Smart (2008) | £153,933 | £264,519 | £4,621,510 | -56% | 4 |
| 15 (12) |  | Wild Child (2008) | £133,671 | £164,917 | £4,875,596 | -34% | 5 |