UK Box Office 28th May, 2021
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) |  | The Conjuring: The Devil Made Me Do It (2021) | £2,708,455 | £2,708,455 | £2,708,455 | new | 1 |
| 2 (1) |  | Peter Rabbit 2: The Runaway (2021) | £2,045,999 | £2,878,388 | £7,484,061 | -56% | 2 |
| 3 (new) |  | Cruella (2021) | £1,453,635 | £1,453,635 | £1,453,635 | new | 1 |
| 4 (new) |  | Demon Slayer The Movie: Mugen Train (2020) | £693,081 | £693,081 | £693,081 | new | 1 |
| 5 (3) |  | Godzilla Vs. Kong (2021) | £254,172 | £508,421 | £1,736,299 | -68% | 2 |
| 6 (2) |  | Nomadland (2021) | £181,702 | £558,591 | £1,433,376 | -79% | 2 |
| 7 (4) |  | Spiral: From the Book of Saw (2021) | £156,292 | £422,546 | £1,201,653 | -80% | 2 |
| 8 (new) | Hidden Agenda (2021) | £104,020 | £104,020 | £104,020 | new | 1 | |
| 9 (9) |  | Tom & Jerry: The Movie (2021) | £79,528 | £123,093 | £458,476 | -66% | 2 |
| 10 (8) |  | Raya and the Last Dragon (2021) | £66,841 | £94,547 | £330,541 | -72% | 2 |
| 11 (6) |  | Mortal Kombat (2021) | £52,967 | £145,849 | £465,162 | -83% | 2 |
| 12 (7) |  | Those Who Wish Me Dead (2021) | £51,158 | £171,706 | £474,359 | -83% | 2 |
| 13 (5) |  | The Unholy (2021) | £38,045 | £160,384 | £565,775 | -91% | 2 |
| 14 (new) |  | First Cow (2020) | £21,862 | £21,862 | £21,862 | new | 1 |
| 15 (14) |  | Minari (2021) | £20,816 | £64,839 | £169,355 | -63% | 2 |
| 16 (11) |  | Judas and the Black Messiah (2021) | £20,386 | £101,248 | £363,024 | -84% | 2 |
| 17 (new) | Frankie (2019) | £12,296 | £12,296 | £12,296 | new | 1 | |
| 18 (new) |  | Earwig and the Witch (2021) | £10,781 | £10,781 | £10,781 | new | 1 |
| 19 (re) | Sir Alex Ferguson: Never Give In (2021) | £5,807 | £5,807 | £66,207 | RE | 1 | |
| 20 (new) |  | Vanquish (2021) | £5,744 | £5,744 | £5,744 | new | 1 |
| 21 (17) |  | Rare Beasts (2021) | £4,064 | £17,044 | £32,619 | -74% | 2 |
| 22 (10) |  | Ammonite (2020) | £3,676 | £21,262 | £151,586 | -97% | 2 |
| 23 (new) | Surge (2021) | £2,896 | £2,896 | £2,896 | new | 1 | |
| 24 (re) | Dennis and Gnasher On the Big Screen (2020) | £1,501 | £1,501 | £38,601 | RE | 4 | |
| 25 (re) |  | Undergods (2021) | £1,463 | £1,463 | £1,851 | RE | 1 |
| 26 (new) |  | Granada Nights (2021) | £1,274 | £1,274 | £1,274 | new | 1 |
| 27 (29) |  | The Witches (2020) | £1,029 | £1,219 | £7,394 | 4% | 2 |
| 28 (new) | Bank Job (2021) | £851 | £851 | £851 | new | 1 | |
| 29 (22) |  | Wonder Woman 1984 (2020) | £805 | £2,873 | £1,580,015 | -84% | 4 |
| 30 (25) |  | Six Minutes to Midnight (2021) | £766 | £9,461 | £19,606 | -79% | 2 |
| 31 (new) |  | Zebra Girl (2021) | £615 | £615 | £615 | new | 1 |
| 32 (20) |  | Hey Duggee At the Cinema (2019) | £578 | £658 | £48,072 | -94% | 19 |
| 33 (new) | Touching the Void (2003) Rerelease | £512 | £512 | £512 | RE | 8 | |
| 34 (27) |  | The Mauritanian (2021) | £303 | £2,400 | £4,170 | -83% | 2 |
| 35 (re) |  | Judy (2019) | £253 | £253 | £8,281,846 | RE | 20 |
| 36 (re) |  | Rocks (2019) | £220 | £220 | £282,036 | RE | 9 |
| 37 (re) | Sisters With Transistors (2021) | £216 | £216 | £495 | RE | 1 | |
| 38 (39) |  | Come Away (2020) | £214 | £300 | £89,663 | 46% | 4 |