| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) | ![]() | Aquaman (2018) | £5,230,285 | £5,230,285 | £5,230,285 | new | 1 |
| 2 (new) | ![]() | Spider-Man: Into the Spider-Verse (2018) | £2,279,995 | £2,279,995 | £2,279,995 | new | 1 |
| 3 (2) | ![]() | The Grinch (2018) | £1,747,936 | £2,194,863 | £21,686,463 | -13% | 6 |
| 4 (1) | ![]() | Ralph Breaks the Internet: Wreck-It Ralph 2 (2018) | £1,402,006 | £1,919,671 | £9,324,458 | -43% | 3 |
| 5 (new) | ![]() | Mortal Engines (2018) | £1,269,441 | £1,269,441 | £1,269,441 | new | 1 |
| 6 (3) | ![]() | Creed II (2018) | £749,740 | £1,424,091 | £7,414,211 | -56% | 3 |
| 7 (4) | ![]() | Fantastic Beasts: The Crimes of Grindelwald (2018) | £700,808 | £1,269,858 | £30,541,674 | -52% | 5 |
| 8 (5) | ![]() | Bohemian Rhapsody (2018) | £537,344 | £1,159,114 | £45,147,461 | -45% | 8 |
| 9 (new) | ![]() | Free Solo (2018) | £387,402 | £387,402 | £387,402 | new | 1 |
| 10 (new) | La Traviata: Met Opera 2018 (2018) | £274,847 | £274,847 | £274,847 | new | 1 | |
| 11 (6) | ![]() | Nativity Rocks! (2018) | £232,820 | £298,705 | £2,203,772 | -30% | 4 |
| 12 (new) | The Cbeebies Christmas Show: Thumbelina (2018) | £195,580 | £195,580 | £195,580 | new | 1 | |
| 13 (new) | ![]() | It's a Wonderful Life (1946) Rerelease | £114,865 | £114,865 | £114,865 | re | 13 |
| 14 (7) | ![]() | The Old Man and the Gun (2018) | £103,447 | £310,771 | £628,602 | -67% | 2 |
| 15 (11) | ![]() | The Nutcracker and the Four Realms (2018) | £96,760 | £125,346 | £5,426,212 | -31% | 7 |
| 16 (new) | Odiyan (2018) | £44,479 | £44,479 | £44,479 | new | 1 | |
| 17 (27) | ![]() | The King and I From the London Palladium (2018) | £40,492 | £171,044 | £1,324,554 | 81% | 3 |
| 18 (13) | ![]() | Widows (2018) | £39,807 | £96,852 | £6,140,398 | -65% | 6 |
| 19 (new) | ![]() | The House That Jack Built (2018) | £32,131 | £32,131 | £32,131 | new | 1 |
| 20 (16) | ![]() | Disobedience (2018) | £29,111 | £70,660 | £441,215 | -60% | 3 |
| 21 (new) | Lizzie (2018) | £24,715 | £24,715 | £24,715 | new | 1 | |
| 22 (new) | Milosc Jest Wszystkim (2018) | £22,651 | £22,651 | £22,651 | new | 1 | |
| 23 (10) | ![]() | Robin Hood (2018) | £22,051 | £85,755 | £2,694,456 | -85% | 4 |
| 24 (new) | ![]() | Bhajjo Veero Ve (2018) | £8,808 | £8,808 | £8,808 | new | 1 |
| 25 (re) | The Nutcracker: ROH London 2018/19 (2018) | £7,127 | £7,127 | £1,122,053 | re | 1 | |
| 26 (new) | ![]() | An Elephant Sitting Still (2018) | £5,596 | £5,596 | £5,596 | new | 1 |
| 27 (18) | ![]() | Tulip Fever (2017) | £5,206 | £58,535 | £108,074 | -89% | 2 |
| 28 (22) | ![]() | Peterloo (2018) | £5,150 | £22,834 | £1,194,144 | -66% | 7 |
| 29 (20) | ![]() | Johnny English Strikes Again (2018) | £4,642 | £10,466 | £17,637,393 | -77% | 11 |
| 30 (44) | King Lear: NT Live 2018 (2018) | £2,838 | £2,838 | £733,422 | 88% | 9 | |
| 31 (25) | ![]() | The Madness of George III: NT Live 2018 (2018) | £2,408 | £11,513 | £522,390 | -68% | 3 |
| 32 (new) | Bizim Icin Sampiyon (2018) | £1,755 | £1,755 | £1,755 | new | 1 | |
| 33 (24) | ![]() | Allelujah: NT Live 2018 (2018) | £1,212 | £8,307 | £900,366 | -86% | 7 |
| 34 (21) | ![]() | The Snowman and the Snowdog (2012) | £1,140 | £1,140 | £19,275 | -94% | 2 |
| 35 (new) | Keepers of the Flame (2018) | £1,083 | £1,083 | £1,083 | new | 1 | |
| 36 (51) | ![]() | They Shall Not Grow Old (2018) | £1,010 | £21,439 | £1,447,445 | 83% | 9 |
| 37 (29) | ![]() | Anna and the Apocalypse (2018) | £738 | £4,791 | £50,227 | -85% | 3 |
| 38 (28) | Nae Pasaran! (2018) | £697 | £6,440 | £85,037 | -88% | 7 | |
| 39 (35) | Juliet, Naked (2018) | £627 | £5,314 | £138,519 | -73% | 7 | |
| 40 (re) | ![]() | Christopher Robin (2018) | £473 | £473 | £14,863,684 | re | 17 |
| 41 (re) | ![]() | Cliff Richard Live 60th Anniversary Tour (2018) | £470 | £470 | £1,224,136 | re | 9 |
| 42 (38) | ![]() | The Wife (2018) | £449 | £2,730 | £1,686,493 | -60% | 12 |
| 43 (42) | Nureyev (2018) | £382 | £382 | £84,738 | -24% | 13 | |
| 44 (39) | ![]() | Mamma Mia! Here We Go Again (2018) | £213 | £1,163 | £65,582,714 | -81% | 22 |
| 45 (41) | Await Further Instructions (2018) | £188 | £2,012 | £2,848 | -78% | 2 | |
| 46 (47) | ![]() | Troilus and Cressida: RSC Live 2018 (2018) | £105 | £601 | £149,060 | -53% | 5 |
| 47 (37) | ![]() | Surviving Christmas With the Relatives (2018) | £94 | £1,019 | £28,984 | -94% | 3 |
| 48 (50) | ![]() | King of Thieves (2018) | £80 | £22,818 | £6,066,139 | -55% | 13 |
| 49 (re) | Back to Berlin (2018) | £67 | £67 | £3,546 | re | 3 | |
| 50 (45) | ![]() | Slaughterhouse Rulez (2018) | £53 | £188 | £571,729 | -83% | 6 |
| 51 (re) | A Christmas Carol 2018 (2018) | £22 | £22 | £347,541 | re | 1 | |