| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Inglourious Basterds (2009) | £3,596,415 | £3,596,415 | £3,596,415 | new | 1 |
| 2 (1) |  | The Time Travelers Wife (2009) | £915,751 | £2,378,952 | £3,789,285 | -35% | 2 |
| 3 (3) |  | G Force (2009) | £654,909 | £1,658,495 | £10,562,742 | -30% | 4 |
| 4 (2) |  | Aliens In the Attic (2009) | £642,522 | £1,570,742 | £2,894,317 | -51% | 2 |
| 5 (4) |  | Harry Potter and the Half Blood Prince (2009) | £598,335 | £1,434,030 | £48,200,855 | -36% | 6 |
| 6 (new) |  | Dance Flick (2009) | £462,825 | £462,825 | £462,825 | new | 1 |
| 7 (5) |  | G.I. Joe: The Rise of Cobra (2009) | £455,536 | £1,183,331 | £5,050,335 | -45% | 3 |
| 8 (6) |  | The Ugly Truth (2009) | £451,023 | £1,177,375 | £5,258,681 | -44% | 3 |
| 9 (8) |  | Ice Age: Dawn of the Dinosaurs (2009) | £336,300 | £890,703 | £33,305,718 | -34% | 8 |
| 10 (9) |  | The Proposal (2009) | £270,691 | £704,929 | £11,072,485 | -39% | 5 |
| 11 (11) |  | Orphan (2009) | £231,312 | £568,755 | £2,143,700 | -39% | 3 |
| 12 (7) | | Bandslam (2009) | £172,895 | £585,602 | £1,214,559 | -73% | 2 |
| 13 (new) | | Shorts (2009) | £171,876 | £171,876 | £171,876 | new | 1 |
| 14 (12) |  | The Taking of Pelham 123 (2009) | £157,444 | £403,633 | £4,720,832 | -51% | 4 |
| 15 (10) |  | A Perfect Getaway (2009) | £141,421 | £429,874 | £848,577 | -66% | 2 |