| 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 |
| 16 (new) |  | Jar City (2008) | £32,784 | £32,784 | £32,784 | new | 1 |
| 17 (23) |  | The Chronicles of Narnia: Prince Caspian (2008) | £27,181 | £28,340 | £11,639,835 | 85% | 12 |
| 18 (18) |  | Man On Wire (2008) | £22,282 | £62,900 | £768,318 | -26% | 7 |
| 19 (17) |  | Somers Town (2008) | £21,882 | £54,339 | £493,116 | -49% | 4 |
| 20 (20) |  | Angus, Thongs and Perfect Snogging (2008) | £7,745 | £12,624 | £5,417,546 | -56% | 8 |
| 21 (19) |  | Miss Pettigrew Lives For a Day (2008) | £7,540 | £28,049 | £383,177 | -59% | 5 |
| 22 (new) | | The Romance of Astrea and Celadon (2008) | £3,444 | £3,444 | £3,444 | new | 1 |
| 23 (22) |  | The Edge of Love (2008) | £2,142 | £9,826 | £1,474,062 | -61% | 12 |
| 24 (new) | | Ashes of Time Redux (2008) | £2,114 | £2,114 | £2,114 | new | 1 |
| 25 (new) |  | Sydney White (2008) | £1,157 | £1,157 | £1,157 | new | 1 |
| 26 (25) |  | Savage Grace (2007) | £623 | £1,637 | £172,930 | -60% | 10 |