| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) | ![]() | Mary Poppins Returns (2018) | £8,181,541 | £8,181,541 | £8,181,541 | new | 1 |
| 2 (1) | ![]() | Aquaman (2018) | £2,383,974 | £4,826,484 | £10,056,769 | -54% | 2 |
| 3 (3) | ![]() | The Grinch (2018) | £1,893,709 | £987,229 | £22,673,692 | 8% | 7 |
| 4 (4) | ![]() | Ralph Breaks the Internet: Wreck-It Ralph 2 (2018) | £1,054,464 | £1,741,200 | £11,065,658 | -25% | 4 |
| 5 (2) | ![]() | Spider-Man: Into the Spider-Verse (2018) | £993,581 | £1,833,013 | £4,113,008 | -56% | 2 |
| 6 (7) | ![]() | Fantastic Beasts: The Crimes of Grindelwald (2018) | £530,670 | £1,108,780 | £31,650,454 | -24% | 6 |
| 7 (6) | ![]() | Creed II (2018) | £453,102 | £957,702 | £8,371,913 | -40% | 4 |
| 8 (8) | ![]() | Bohemian Rhapsody (2018) | £413,563 | £998,518 | £46,145,979 | -23% | 9 |
| 9 (new) | Zero (2018) | £331,795 | £331,795 | £331,795 | new | 1 | |
| 10 (11) | ![]() | Nativity Rocks! (2018) | £302,975 | £500,091 | £2,703,863 | 23% | 5 |
| 11 (new) | The Nutcracker: Bolshoi Ballet 18/19 (2018) | £258,038 | £258,038 | £258,038 | new | 1 | |
| 12 (13) | ![]() | It's a Wonderful Life (1946) Rerelease | £161,966 | £161,966 | £276,831 | 29% | 14 |
| 13 (5) | ![]() | Mortal Engines (2018) | £96,727 | £346,539 | £1,615,980 | -92% | 2 |
| 14 (re) | ![]() | Smallfoot (2018) | £90,138 | £90,138 | £11,113,089 | re | 8 |
| 15 (9) | ![]() | Free Solo (2018) | £86,945 | £213,656 | £601,058 | -78% | 2 |
| 16 (18) | ![]() | Widows (2018) | £23,294 | £76,138 | £6,216,536 | -41% | 7 |
| 17 (new) | Maari 2 (2018) | £19,166 | £19,166 | £19,166 | new | 1 | |
| 18 (20) | ![]() | Disobedience (2018) | £12,092 | £37,199 | £478,414 | -58% | 4 |
| 19 (new) | Adanga Maru (2018) | £8,368 | £8,368 | £8,368 | new | 1 | |
| 20 (23) | ![]() | Robin Hood (2018) | £6,200 | £49,072 | £2,743,528 | -72% | 5 |
| 21 (25) | The Nutcracker: ROH London 2018/19 (2018) | £4,892 | £31,880 | £1,153,933 | -31% | 2 | |
| 22 (new) | 1985 (2018) | £3,844 | £3,844 | £3,844 | new | 1 | |
| 23 (34) | ![]() | The Snowman and the Snowdog (2012) | £3,463 | £3,463 | £22,738 | 67% | 3 |
| 24 (new) | Polina (2018) | £3,204 | £3,204 | £3,204 | new | 1 | |
| 25 (27) | ![]() | Tulip Fever (2017) | £2,801 | £11,192 | £119,266 | -46% | 3 |
| 26 (12) | The Cbeebies Christmas Show: Thumbelina (2018) | £2,675 | £16,418 | £211,998 | -99% | 2 | |
| 27 (17) | ![]() | The King and I From the London Palladium (2018) | £2,054 | £62,850 | £1,387,404 | -95% | 4 |
| 28 (37) | ![]() | Anna and the Apocalypse (2018) | £2,005 | £3,505 | £53,732 | 63% | 4 |
| 29 (re) | Antony and Cleopatra: NT Live 2018 (2018) | £1,952 | £1,952 | £561,677 | re | 1 | |
| 30 (33) | ![]() | Allelujah: NT Live 2018 (2018) | £1,893 | £10,467 | £910,833 | 36% | 8 |
| 31 (new) | Seethakaathi (2018) | £1,609 | £1,609 | £1,609 | new | 1 | |
| 32 (re) | ![]() | Matthew Bourne's Cinderella (2018) | £1,368 | £1,368 | £130,707 | re | 2 |
| 33 (29) | ![]() | Johnny English Strikes Again (2018) | £845 | £2,340 | £17,639,733 | -82% | 12 |
| 34 (28) | ![]() | Peterloo (2018) | £751 | £8,439 | £1,202,583 | -85% | 8 |
| 35 (44) | ![]() | Mamma Mia! Here We Go Again (2018) | £669 | £971 | £65,583,685 | 68% | 23 |
| 36 (42) | ![]() | The Wife (2018) | £660 | £3,337 | £1,689,830 | 32% | 13 |
| 37 (new) | Antariksham 9000 Kmph (2018) | £596 | £596 | £596 | new | 1 | |
| 38 (39) | Juliet, Naked (2018) | £516 | £3,812 | £142,331 | -18% | 8 | |
| 39 (38) | Nae Pasaran! (2018) | £476 | £1,530 | £86,567 | -32% | 8 | |
| 40 (re) | ![]() | Everybody's Talking About Jamie (2018) | £475 | £475 | £728,983 | re | 13 |
| 41 (47) | ![]() | Surviving Christmas With the Relatives (2018) | £422 | £504 | £29,488 | 78% | 4 |
| 42 (re) | ![]() | The Children Act (2018) | £326 | £326 | £2,875,350 | re | 13 |
| 43 (40) | ![]() | Christopher Robin (2018) | £254 | £1,886 | £14,865,570 | -46% | 18 |
| 44 (re) | Sgt. Stubby: An Unlikely Hero (2018) | £183 | £183 | £138,830 | re | 17 | |
| 45 (50) | ![]() | Slaughterhouse Rulez (2018) | £123 | £307 | £572,036 | 57% | 7 |