| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | Fantastic Beasts: The Crimes of Grindelwald (2018) | £5,622,755 | £9,724,824 | £22,043,790 | -54% | 2 |
| 2 (2) |  | The Grinch (2018) | £3,283,072 | £4,035,372 | £14,079,595 | -16% | 3 |
| 3 (3) |  | Bohemian Rhapsody (2018) | £2,211,454 | £4,149,666 | £39,003,704 | -27% | 5 |
| 4 (new) |  | Robin Hood (2018) | £1,330,387 | £1,330,387 | £1,330,387 | new | 1 |
| 5 (new) |  | Nativity Rocks! (2018) | £834,414 | £834,414 | £834,414 | new | 1 |
| 6 (new) |  | The Girl In the Spider's Web (2018) | £557,403 | £557,403 | £557,403 | new | 1 |
| 7 (4) |  | Widows (2018) | £457,079 | £949,506 | £5,266,931 | -48% | 3 |
| 8 (5) |  | A Star Is Born (2018) | £421,692 | £924,596 | £28,032,284 | -44% | 8 |
| 9 (7) |  | The Nutcracker and the Four Realms (2018) | £376,046 | £513,074 | £4,839,140 | -38% | 4 |
| 10 (new) |  | Planeta Singli 2 (2018) | £143,884 | £143,884 | £143,884 | new | 1 |
| 11 (new) | | Shoplifters (2018) | £117,555 | £117,555 | £117,555 | new | 1 |
| 12 (8) |  | Johnny English Strikes Again (2018) | £88,931 | £136,637 | £17,547,857 | -59% | 8 |
| 13 (10) |  | Smallfoot (2018) | £78,214 | £92,818 | £10,932,839 | -51% | 7 |
| 14 (new) |  | Assassination Nation (2018) | £70,891 | £70,891 | £70,891 | new | 1 |
| 15 (new) |  | Nobody's Fool (2018) | £70,703 | £70,703 | £70,703 | new | 1 |
| 16 (16) |  | Peterloo (2018) | £35,928 | £104,812 | £1,067,950 | -38% | 4 |
| 17 (31) |  | Christopher Robin (2018) | £15,382 | £33,042 | £14,850,354 | 74% | 15 |
| 18 (new) | | Marriage Palace (2018) | £10,979 | £10,979 | £10,979 | new | 1 |
| 19 (22) |  | Allelujah: NT Live 2018 (2018) | £8,483 | £12,617 | £834,686 | 11% | 4 |
| 20 (45) |  | They Shall Not Grow Old (2018) | £5,726 | £5,726 | £1,423,002 | 92% | 6 |
| 21 (new) |  | The Camino Voyage (2018) | £5,690 | £5,690 | £5,690 | new | 1 |
| 22 (30) |  | Funny Girl: The Musical (2018) | £4,943 | £11,246 | £628,713 | 16% | 5 |
| 23 (new) |  | Postcards From London (2018) | £4,552 | £4,552 | £4,552 | new | 1 |
| 24 (26) | | Nae Pasaran! (2018) | £4,180 | £10,347 | £61,973 | -35% | 4 |
| 25 (33) |  | Cold War (2018) | £4,091 | £9,893 | £1,140,710 | 16% | 13 |
| 26 (new) | | South Wind (2018) | £2,808 | £2,808 | £2,808 | new | 1 |
| 27 (34) | | Juliet, Naked (2018) | £2,563 | £5,542 | £123,583 | -18% | 4 |
| 28 (32) |  | Cliff Richard Live 60th Anniversary Tour (2018) | £2,422 | £2,468 | £1,222,643 | -36% | 7 |
| 29 (new) | | Thimiru Pudichavan (2018) | £2,217 | £2,217 | £2,217 | new | 1 |
| 30 (27) |  | The Wife (2018) | £1,972 | £17,503 | £1,660,106 | -69% | 9 |
| 31 (44) | | Nureyev (2018) | £1,904 | £1,904 | £77,917 | 75% | 10 |
| 32 (new) | | Back to Berlin (2018) | £1,693 | £1,693 | £1,693 | new | 1 |
| 33 (38) | | Exhibition On Screen: Degas Passion For Perfection (2018) | £1,408 | £5,931 | £68,550 | -2% | 3 |
| 34 (re) |  | The Madness of George III: NT Live 2018 (2018) | £1,342 | £1,342 | £459,300 | re | 1 |
| 35 (re) | | MGC Presents Red (2018) | £1,247 | £1,247 | £39,216 | re | 2 |
| 36 (29) |  | Mamma Mia! Here We Go Again (2018) | £1,233 | £17,711 | £65,577,753 | -72% | 19 |
| 37 (48) | | Becoming Animal (2018) | £1,112 | £1,112 | £1,205 | 92% | 2 |
| 38 (new) | | Rang Panjab (2018) | £970 | £970 | £970 | new | 1 |
| 39 (new) | | Bizi Hatirla (2018) | £832 | £832 | £832 | new | 1 |
| 40 (18) | | Make Us Dream (2018) | £738 | £1,146 | £38,577 | -98% | 2 |
| 41 (new) | | The Judge (2018) | £679 | £679 | £679 | new | 1 |
| 42 (46) | | Matangi / Maya / M.I.A. (2018) | £574 | £1,540 | £136,980 | 31% | 9 |
| 43 (42) |  | Troilus and Cressida: RSC Live 2018 (2018) | £473 | £5,343 | £145,249 | -19% | 2 |
| 44 (43) |  | The Little Stranger (2018) | £459 | £1,806 | £786,730 | -8% | 10 |
| 45 (re) |  | Mission:Impossible - Fallout (2018) | £248 | £248 | £24,396,951 | re | 17 |
| 46 (new) | | Bengali Beauty (2018) | £222 | £222 | £222 | new | 1 |
| 47 (49) | | HYMN Sarah Brightman In Concert (2018) | £89 | £89 | £8,922 | 44% | 3 |
| 48 (23) | | Dead In a Week Or Your Money Back (2018) | £48 | £3,807 | £11,151 | -99% | 2 |
| 49 (re) | | Hurricane (2018) | £48 | £48 | £132,913 | re | 9 |
| 50 (41) |  | Slaughterhouse Rulez (2018) | £35 | £889 | £571,074 | -96% | 4 |