UK Weekend Box Office
UK Box Office 29th December, 1978
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) |  | Superman (1978) | £1,385,677 | £1,801,380 | £11,206,120 | -79% | 3 |
| 2 (new) |  | Jaws 2 (1978) | £976,286 | £976,286 | £976,286 | new | 1 |
| 3 (2) |  | Watership Down (1978) | £140,733 | £204,063 | £803,583 | -17% | 3 |
| 4 (3) | Piranha (1978) | £32,706 | £47,424 | £732,406 | -17% | 6 | |
| 5 (4) |  | Heaven Can Wait (1978) | £8,153 | £11,822 | £1,309,744 | -52% | 10 |
| 6 (5) | Force 10 From Navarone (1978) | £3,438 | £4,985 | £247,509 | -17% | 7 | |
| 7 (6) |  | The Cat From Outer Space (1978) | £993 | £1,341 | £812,985 | -47% | 10 |
| 8 (7) |  | Grease (1978) | £605 | £787 | £4,078,944 | -41% | 16 |