UK Box Office 22nd September, 1978
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) |  | Grease (1978) | £1,000,871 | £1,301,132 | £2,033,212 | 27% | 2 |
| 2 (2) |  | Foul Play (1978) | £165,648 | £240,190 | £571,486 | -50% | 2 |
| 3 (3) | The Silent Partner (1978) | £74,859 | £104,803 | £598,869 | -50% | 3 | |
| 4 (4) |  | Herbie Goes to Monte Carlo (1978) | £39,658 | £53,538 | £1,447,523 | -60% | 5 |
| 5 (5) | Convoy (1978) | £20,637 | £29,924 | £760,470 | -50% | 5 | |
| 6 (6) | The Legacy (1978) | £13,702 | £18,498 | £362,143 | -58% | 4 | |
| 7 (7) |  | Midnight Express (1978) | £3,836 | £4,987 | £924,524 | -55% | 7 |
| 8 (8) |  | The Wild Geese (1978) | £938 | £1,313 | £1,668,677 | -44% | 12 |