| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | Harry Potter and the Half Blood Prince (2009) | £5,176,950 | £13,285,257 | £33,070,181 | -74% | 2 |
| 2 (new) |  | The Proposal (2009) | £3,249,640 | £3,249,640 | £3,249,640 | new | 1 |
| 3 (2) |  | Ice Age: Dawn of the Dinosaurs (2009) | £2,151,251 | £4,957,085 | £25,257,783 | -25% | 4 |
| 4 (3) |  | Brüno (2009) | £1,212,641 | £2,796,130 | £13,153,625 | -47% | 3 |
| 5 (4) |  | The Hangover (2009) | £687,772 | £1,343,267 | £19,485,350 | -22% | 7 |
| 6 (5) |  | Transformers: Revenge of the Fallen (2009) | £416,579 | £965,442 | £25,885,419 | -39% | 6 |
| 7 (6) |  | Public Enemies (2009) | £277,353 | £625,088 | £6,353,498 | -41% | 4 |
| 8 (7) |  | My Sisters Keeper (2009) | £224,320 | £646,658 | £5,602,199 | -41% | 5 |
| 9 (8) |  | Moon (2009) | £137,963 | £290,971 | £448,838 | -13% | 2 |
| 10 (new) |  | Antichrist (2009) | £99,092 | £99,092 | £99,092 | new | 1 |
| 11 (new) | | Luck (2009) | £86,635 | £86,635 | £86,635 | new | 1 |
| 12 (10) |  | Night At the Museum 2 (2009) | £35,786 | £100,568 | £19,661,121 | -28% | 10 |
| 13 (re) |  | Race to Witch Mountain (2009) | £32,968 | £32,968 | £2,545,316 | RE | 5 |
| 14 (13) | | 35 Shots of Rum (2009) | £20,292 | £46,816 | £125,191 | -34% | 3 |
| 15 (11) | | Kambakkht Ishq (2009) | £19,366 | £43,432 | £681,134 | -42% | 4 |