UK Box Office 1st December, 1978
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) | Piranha (1978) | £118,682 | £172,089 | £421,322 | -52% | 2 | |
| 2 (2) |  | Heaven Can Wait (1978) | £39,448 | £57,200 | £1,201,048 | -38% | 6 |
| 3 (3) | Force 10 From Navarone (1978) | £22,182 | £28,837 | £209,894 | -52% | 3 | |
| 4 (4) |  | Death On the Nile (1978) | £17,276 | £23,323 | £868,547 | -44% | 6 |
| 5 (5) |  | The Cat From Outer Space (1978) | £12,938 | £18,113 | £795,162 | -47% | 6 |
| 6 (6) |  | Power Play (1978) | £5,182 | £6,996 | £140,166 | -44% | 5 |
| 7 (7) |  | Grease (1978) | £5,054 | £7,328 | £4,070,264 | -41% | 12 |