UK Box Office 12th May, 1978
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) |  | Pete's Dragon (1978) | £31,314 | £45,405 | £915,495 | -61% | 5 |
| 2 (2) |  | Close Encounters of the Third Kind (1978) | £18,887 | £26,442 | £12,617,029 | -69% | 9 |
| 3 (3) |  | The Stud (1978) | £8,250 | £11,550 | £1,247,993 | -83% | 5 |
| 4 (4) |  | Saturday Night Fever (1978) | £3,656 | £4,936 | £3,183,993 | -79% | 8 |
| 5 (5) |  | Star Wars (1977) | £1,196 | £1,734 | £15,438,571 | -88% | 20 |