| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | The Time Travelers Wife (2009) | £1,410,333 | £1,410,333 | £1,410,333 | new | 1 |
| 2 (new) |  | Aliens In the Attic (2009) | £1,323,575 | £1,323,575 | £1,323,575 | new | 1 |
| 3 (4) |  | G Force (2009) | £941,848 | £2,632,917 | £8,904,247 | -23% | 3 |
| 4 (3) |  | Harry Potter and the Half Blood Prince (2009) | £932,745 | £2,390,009 | £46,766,825 | -31% | 5 |
| 5 (2) |  | G.I. Joe: The Rise of Cobra (2009) | £827,389 | £2,158,244 | £3,867,004 | -52% | 2 |
| 6 (1) |  | The Ugly Truth (2009) | £809,390 | £2,105,263 | £4,081,306 | -59% | 2 |
| 7 (new) | | Bandslam (2009) | £628,957 | £628,957 | £628,957 | new | 1 |
| 8 (7) |  | Ice Age: Dawn of the Dinosaurs (2009) | £508,915 | £1,390,863 | £32,415,015 | -17% | 7 |
| 9 (5) |  | The Proposal (2009) | £445,689 | £1,310,902 | £10,367,556 | -41% | 4 |
| 10 (new) |  | A Perfect Getaway (2009) | £418,703 | £418,703 | £418,703 | new | 1 |
| 11 (8) |  | Orphan (2009) | £379,179 | £1,004,799 | £1,574,945 | -33% | 2 |
| 12 (6) |  | The Taking of Pelham 123 (2009) | £324,239 | £865,027 | £4,317,199 | -51% | 3 |
| 13 (10) | | Coco Before Chanel (2009) | £178,341 | £473,324 | £1,530,936 | -29% | 3 |
| 14 (9) |  | The Hangover (2009) | £145,865 | £359,906 | £21,620,272 | -48% | 10 |
| 15 (new) | | Kaminey (2009) | £111,954 | £111,954 | £111,954 | new | 1 |