UK Box Office 21st May, 2021
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) |  | Peter Rabbit 2: The Runaway (2021) | £4,605,673 | £4,605,673 | £4,605,673 | new | 1 |
| 2 (new) |  | Nomadland (2021) | £874,785 | £874,785 | £874,785 | new | 1 |
| 3 (re) |  | Godzilla Vs. Kong (2021) | £783,879 | £783,879 | £1,227,878 | RE | 1 |
| 4 (new) |  | Spiral: From the Book of Saw (2021) | £779,107 | £779,107 | £779,107 | new | 1 |
| 5 (new) |  | The Unholy (2021) | £405,391 | £405,391 | £405,391 | new | 1 |
| 6 (new) |  | Mortal Kombat (2021) | £319,313 | £319,313 | £319,313 | new | 1 |
| 7 (new) |  | Those Who Wish Me Dead (2021) | £302,653 | £302,653 | £302,653 | new | 1 |
| 8 (new) |  | Raya and the Last Dragon (2021) | £235,994 | £235,994 | £235,994 | new | 1 |
| 9 (re) |  | Tom & Jerry: The Movie (2021) | £235,805 | £235,805 | £335,383 | RE | 1 |
| 10 (new) |  | Ammonite (2020) | £130,324 | £130,324 | £130,324 | new | 1 |
| 11 (re) |  | Judas and the Black Messiah (2021) | £127,469 | £127,469 | £261,776 | RE | 1 |
| 12 (new) |  | Sound of Metal (2021) | £84,570 | £84,570 | £84,570 | new | 1 |
| 13 (new) |  | Radhe: The Most Wanted Bhai (2021) | £64,411 | £64,411 | £64,411 | new | 1 |
| 14 (re) |  | Minari (2021) | £56,124 | £56,124 | £104,516 | RE | 1 |
| 15 (new) |  | Maya the Bee 3: The Golden Orb (2021) | £45,556 | £45,556 | £45,556 | new | 1 |
| 16 (new) |  | My New York Year (2021) | £19,568 | £19,568 | £19,568 | new | 1 |
| 17 (new) |  | Rare Beasts (2021) | £15,575 | £15,575 | £15,575 | new | 1 |
| 18 (new) | Glastonbury Presents: Live At Worthy Farm (2021) | £12,001 | £12,001 | £12,001 | new | 1 | |
| 19 (new) |  | Gladiator (2000) Rerelease | £11,489 | £11,489 | £11,489 | RE | 21 |
| 20 (re) |  | Hey Duggee At the Cinema (2019) | £10,315 | £10,315 | £47,414 | RE | 18 |
| 21 (new) | śCiema Po Polsku (2021) | £10,281 | £10,281 | £10,281 | new | 1 | |
| 22 (re) |  | Wonder Woman 1984 (2020) | £5,117 | £5,117 | £1,577,142 | RE | 3 |
| 23 (new) | Apples (2021) | £5,016 | £5,016 | £5,016 | new | 1 | |
| 24 (new) |  | The Human Factor (2021) | £4,324 | £4,324 | £4,324 | new | 1 |
| 25 (re) |  | Six Minutes to Midnight (2021) | £3,681 | £3,681 | £10,145 | RE | 1 |
| 26 (new) |  | Spring Blossom (2021) | £2,454 | £2,454 | £2,454 | new | 1 |
| 27 (new) |  | The Mauritanian (2021) | £1,770 | £1,770 | £1,770 | new | 1 |
| 28 (re) |  | Black Narcissus (1947) Rerelease | £1,173 | £1,173 | £41,061 | RE | 1 |
| 29 (re) |  | The Witches (2020) | £990 | £990 | £6,175 | RE | 1 |
| 30 (new) | Poly Styrene: I Am a Cliche (2021) | £714 | £714 | £714 | new | 1 | |
| 31 (new) | The United Way (2021) | £665 | £665 | £665 | new | 1 | |
| 32 (new) | State Funeral (2021) | £592 | £592 | £592 | new | 1 | |
| 33 (re) |  | 2001: A Space Odyssey (1968) Rerelease | £536 | £536 | £366,070 | RE | 43 |
| 34 (re) |  | Bohemian Rhapsody (2018) | £432 | £432 | £55,369,088 | RE | 49 |
| 35 (re) |  | Dumbo (2019) | £216 | £216 | £25,142,945 | RE | 30 |
| 36 (re) |  | Aladdin (2019) | £192 | £192 | £37,253,909 | RE | 31 |
| 37 (re) |  | The Secret Garden (2020) | £160 | £160 | £735,118 | RE | 11 |
| 38 (re) |  | Summerland (2020) | £140 | £140 | £165,889 | RE | 18 |
| 39 (re) |  | Come Away (2020) | £116 | £116 | £89,363 | RE | 3 |
| 40 (new) |  | The Terminator (1984) Rerelease | £104 | £104 | £104 | RE | 12 |
| 41 (re) |  | Queen and Slim (2020) | £58 | £58 | £1,355,010 | RE | 5 |