UK Box Office 8th December, 1978
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) | Piranha (1978) | £98,902 | £138,463 | £559,785 | -17% | 3 | |
| 2 (2) |  | Heaven Can Wait (1978) | £32,873 | £46,022 | £1,247,070 | -17% | 7 |
| 3 (3) | Force 10 From Navarone (1978) | £13,864 | £18,023 | £227,917 | -37% | 4 | |
| 4 (4) |  | Death On the Nile (1978) | £9,598 | £13,437 | £881,984 | -44% | 7 |
| 5 (5) |  | The Cat From Outer Space (1978) | £6,809 | £9,192 | £804,354 | -47% | 7 |
| 6 (7) |  | Grease (1978) | £2,973 | £3,865 | £4,074,129 | -41% | 13 |
| 7 (6) |  | Power Play (1978) | £2,879 | £4,175 | £144,341 | -44% | 6 |