UK Box Office 21st December, 2018
| 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 |