UK Box Office 5th May, 1978
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) |  | Pete's Dragon (1978) | £80,163 | £108,220 | £870,090 | -38% | 4 |
| 2 (3) |  | Close Encounters of the Third Kind (1978) | £61,382 | £89,004 | £12,590,587 | -23% | 8 |
| 3 (2) |  | The Stud (1978) | £47,519 | £61,775 | £1,236,443 | -58% | 4 |
| 4 (5) |  | Saturday Night Fever (1978) | £17,694 | £23,002 | £3,179,057 | -55% | 7 |
| 5 (4) |  | Star Wars (1977) | £9,626 | £13,476 | £15,436,837 | -78% | 19 |