| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) | ![]() | Black Panther (2018) | £2,931,682 | £4,467,793 | £39,830,023 | -22% | 4 |
| 2 (3) | ![]() | The Greatest Showman (2017) | £1,567,366 | £2,071,569 | £37,336,900 | 21% | 11 |
| 3 (2) | ![]() | Red Sparrow (2018) | £1,166,764 | £2,176,470 | £4,019,594 | -37% | 2 |
| 4 (4) | ![]() | Game Night (2018) | £703,115 | £1,546,215 | £2,640,693 | -36% | 2 |
| 5 (5) | ![]() | Lady Bird (2017) | £703,115 | £1,349,960 | £3,973,500 | -24% | 3 |
| 6 (9) | ![]() | Finding Your Feet (2018) | £573,481 | £1,419,554 | £3,547,352 | 19% | 3 |
| 7 (10) | ![]() | The Shape of Water (2018) | £552,230 | £1,070,250 | £6,349,265 | 24% | 4 |
| 8 (7) | ![]() | Coco (2018) | £465,033 | £522,961 | £17,787,726 | -16% | 8 |
| 9 (8) | ![]() | I, Tonya (2017) | £407,933 | £815,380 | £2,826,908 | -25% | 3 |
| 10 (12) | ![]() | Three Billboards Outside Ebbing, Missouri (2018) | £359,714 | £773,605 | £13,903,885 | -11% | 9 |
| 11 (11) | ![]() | Early Man (2018) | £292,131 | £320,030 | £10,402,603 | -29% | 7 |
| 12 (new) | ![]() | You Were Never Really Here (2018) | £288,344 | £288,344 | £288,344 | new | 1 |
| 13 (new) | ![]() | Gringo (2018) | £215,029 | £215,029 | £215,029 | new | 1 |
| 14 (13) | ![]() | Fifty Shades Freed (2018) | £185,323 | £509,188 | £17,521,819 | -47% | 5 |
| 15 (new) | ![]() | Mamma Mia! (2008) Rerelase | £174,660 | £174,660 | £174,660 | re | 29 |
| 16 (new) | Semiramide: Met Opera 2018 (2018) | £166,208 | £166,208 | £166,208 | new | 1 | |
| 17 (15) | ![]() | Darkest Hour (2018) | £143,812 | £379,072 | £23,545,978 | -11% | 9 |
| 18 (16) | Monster Family (2018) | £103,110 | £120,785 | £247,020 | -18% | 2 | |
| 19 (new) | Walk Like a Panther (2018) | £91,333 | £91,333 | £91,333 | new | 1 | |
| 20 (new) | ![]() | Bombshell: The Hedy Lamarr Story (2018) | £61,766 | £61,766 | £61,766 | new | 1 |
| 21 (re) | Carmen: ROH London 2017/18 (2018) | £57,931 | £57,931 | £680,421 | re | 1 | |
| 22 (new) | ![]() | Laung Laachi (2018) | £50,203 | £50,203 | £50,203 | new | 1 |
| 23 (new) | Mom and Dad (2018) | £47,102 | £47,102 | £47,102 | new | 1 | |
| 24 (new) | ![]() | Wonder Wheel (2018) | £42,976 | £42,976 | £42,976 | new | 1 |
| 25 (new) | Sweet Country (2018) | £29,067 | £29,067 | £29,067 | new | 1 | |
| 26 (19) | ![]() | Phantom Thread (2018) | £26,793 | £72,695 | £2,542,770 | -23% | 6 |
| 27 (28) | ![]() | Dunkirk (2017) | £20,262 | £22,702 | £56,753,171 | 83% | 31 |
| 28 (25) | ![]() | Cat On a Hot Tin Roof: NT Live 2018 (2018) | £8,158 | £31,737 | £720,337 | 8% | 3 |
| 29 (22) | ![]() | The Mercy (2018) | £7,444 | £26,061 | £805,510 | -34% | 5 |
| 30 (new) | The Lodgers (2018) | £5,818 | £5,818 | £5,818 | new | 1 | |
| 31 (26) | ![]() | Journeys End (2018) | £5,410 | £24,330 | £461,741 | -23% | 6 |
| 32 (new) | Scott and Sid (2018) | £5,385 | £5,385 | £5,385 | new | 1 | |
| 33 (27) | Dark River (2018) | £4,961 | £13,928 | £71,969 | -15% | 3 | |
| 34 (new) | Ailecek Saskiniz (2018) | £4,497 | £4,497 | £4,497 | new | 1 | |
| 35 (29) | ![]() | All the Money In the World (2018) | £4,471 | £33,894 | £3,220,425 | 51% | 10 |
| 36 (new) | ![]() | Wives On Strike: The Revolution (2018) | £2,510 | £2,510 | £2,510 | new | 1 |
| 37 (new) | Along With the Gods: The Two Worlds (2018) | £1,513 | £1,513 | £1,513 | new | 1 | |
| 38 (23) | ![]() | Paddington 2 (2017) | £1,234 | £4,523 | £42,618,693 | -89% | 18 |
| 39 (new) | ![]() | Aschhe Abar Shabor (2018) | £1,085 | £1,085 | £1,085 | new | 1 |
| 40 (31) | ![]() | The Ice King (2018) | £803 | £1,802 | £10,592 | -46% | 3 |
| 41 (30) | Erase and Forget (2018) | £657 | £1,037 | £2,560 | -57% | 2 | |
| 42 (36) | ![]() | Walk With Me (2017) | £483 | £1,889 | £166,575 | -39% | 9 |
| 43 (39) | ![]() | The Commuter (2018) | £420 | £1,457 | £3,950,773 | -17% | 8 |
| 44 (40) | ![]() | Loving Vincent (2017) | £301 | £1,848 | £1,011,775 | -25% | 21 |
| 45 (37) | ![]() | Star Wars: The Last Jedi (2017) | £34 | £2,097 | £82,674,967 | -96% | 13 |