UK Box Office 21st September, 1979
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) |  | Alien (1979) | £835,196 | £1,211,034 | £2,650,363 | 32% | 3 |
| 2 (new) |  | The Bitch (1979) | £560,156 | £560,156 | £560,156 | new | 1 |
| 3 (2) |  | Manhattan (1979) | £71,742 | £96,852 | £1,623,701 | -41% | 5 |
| 4 (3) |  | Moonraker (1979) | £50,761 | £68,527 | £7,834,473 | -58% | 9 |
| 5 (4) |  | Porridge (1979) | £37,525 | £48,783 | £1,740,558 | -35% | 7 |