UK Box Office 17th March, 1978
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) |  | Close Encounters of the Third Kind (1978) | £937,138 | £937,138 | £937,138 | new | 1 |
| 2 (1) |  | Star Wars (1977) | £708,921 | £921,597 | £12,093,720 | 23% | 12 |
| 3 (2) |  | Abba: The Movie (1978) | £45,541 | £66,034 | £1,242,340 | -44% | 5 |
| 4 (3) |  | Tomorrow Never Comes (1978) | £29,847 | £41,786 | £231,765 | -47% | 3 |