UK Box Office 7th April, 1978
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) |  | Saturday Night Fever (1978) | £414,500 | £538,850 | £2,730,501 | -55% | 3 |
| 2 (3) |  | Star Wars (1977) | £319,914 | £463,875 | £13,849,787 | 81% | 15 |
| 3 (2) |  | Close Encounters of the Third Kind (1978) | £269,711 | £377,595 | £11,892,739 | -50% | 4 |
| 4 (4) |  | What's Up Superdoc! (1978) | £9,666 | £14,016 | £114,539 | -62% | 3 |
| 5 (5) |  | Abba: The Movie (1978) | £7,809 | £10,542 | £1,306,014 | -44% | 8 |
| 6 (6) |  | Tomorrow Never Comes (1978) | £4,352 | £6,310 | £269,659 | -47% | 6 |