| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | Iron Man (2008) | £1,917,925 | £2,836,934 | £12,996,686 | -3% | 3 |
| 2 (2) |  | What Happens In Vegas... () | £1,513,887 | £2,249,169 | £3,512,262 | 17% | 2 |
| 3 (3) |  | Forgetting Sarah Marshall (2008) | £570,986 | £862,569 | £6,451,403 | 8% | 4 |
| 4 (5) |  | Nims Island (2008) | £450,375 | £518,490 | £2,129,808 | 30% | 3 |
| 5 (4) |  | Speed Racer () | £410,610 | £531,836 | £893,938 | 12% | 2 |
| 6 (7) |  | Made of Honor () | £285,040 | £461,670 | £1,944,757 | 2% | 3 |
| 7 (6) |  | Doomsday () | £253,318 | £445,219 | £756,602 | -19% | 2 |
| 8 (8) |  | In Bruges () | £133,829 | £207,487 | £4,533,917 | 23% | 10 |
| 9 (new) |  | Caramel (2008) | £122,790 | £122,790 | £122,790 | new | 1 |
| 10 (9) |  | 21 (2008) | £97,192 | £150,299 | £5,430,673 | 8% | 6 |
| 11 (new) |  | Charlie Bartlett () | £97,181 | £97,181 | £97,181 | new | 1 |
| 12 (new) |  | Smart People (2008) | £88,235 | £88,235 | £88,235 | new | 1 |
| 13 (10) |  | The Eye (2008) | £83,511 | £134,057 | £1,783,992 | -6% | 4 |
| 14 (new) |  | Shutter () | £72,574 | £72,574 | £72,574 | new | 1 |
| 15 (11) |  | Happy-Go-Lucky () | £69,510 | £121,941 | £1,413,253 | 16% | 5 |
| 16 (new) | | Jannat (2008) | £49,255 | £49,255 | £49,255 | new | 1 |
| 17 (new) |  | Outpost (2008) | £38,668 | £38,668 | £38,668 | new | 1 |
| 18 (new) | | Heartbeat Detector (2008) | £16,231 | £16,231 | £16,231 | new | 1 |
| 19 (17) |  | Son of Rambow (2008) | £12,382 | £30,554 | £5,408,118 | -35% | 7 |
| 20 (re) | | Joy Division () | £11,551 | £11,551 | £72,625 | re | 2 |
| 21 (20) |  | The Oxford Murders (2008) | £9,612 | £15,529 | £212,194 | 27% | 4 |
| 22 (14) |  | Kuruvi () | £5,168 | £13,236 | £196,496 | -77% | 3 |
| 23 (new) | | The Air I Breathe () | £1,998 | £1,998 | £1,998 | new | 1 |
| 24 (23) |  | Love In the Time of Cholera () | £1,363 | £3,126 | £361,250 | -27% | 9 |
| 25 (new) |  | La Antena () | £778 | £778 | £778 | new | 1 |
| 26 (24) |  | Cashback () | £93 | £1,590 | £3,119 | -94% | 2 |