| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Rocknrolla (2008) | £1,565,439 | £1,565,439 | £1,565,439 | new | 1 |
| 2 (2) |  | Mamma Mia! (2008) | £1,431,775 | £3,146,203 | £57,687,650 | -8% | 9 |
| 3 (new) |  | The Duchess (2008) | £1,402,200 | £1,402,200 | £1,402,200 | new | 1 |
| 4 (1) |  | Step Brother's (2008) | £1,105,342 | £2,321,782 | £4,003,274 | -34% | 2 |
| 5 (new) |  | Disaster Movie (2008) | £925,655 | £925,655 | £925,655 | new | 1 |
| 6 (3) |  | The Strangers (2008) | £746,507 | £1,598,429 | £2,849,053 | -40% | 2 |
| 7 (5) |  | The Dark Knight (2008) | £586,944 | £630,913 | £46,418,476 | -35% | 7 |
| 8 (4) |  | Hellboy II: The Golden Army (2008) | £507,908 | £1,126,555 | £6,772,936 | -50% | 3 |
| 9 (6) |  | Get Smart (2008) | £350,456 | £863,385 | £4,356,991 | -51% | 3 |
| 10 (new) |  | Bangkok Dangerous (2008) | £307,420 | £307,420 | £307,420 | new | 1 |
| 11 (10) |  | WALL•E (2008) | £277,277 | £551,004 | £22,034,562 | -23% | 8 |
| 12 (9) |  | Wild Child (2008) | £203,776 | £513,113 | £4,710,679 | -48% | 4 |
| 13 (7) |  | Babylon A.D. (2008) | £161,179 | £480,920 | £1,017,888 | -70% | 2 |
| 14 (8) |  | You Don't Mess With the Zohan (2008) | £139,677 | £431,427 | £5,200,666 | -67% | 4 |
| 15 (12) |  | Star Wars: The Clone Wars (2008) | £131,252 | £256,524 | £2,775,350 | -37% | 4 |
| 16 (new) |  | Mera Pind (2008) | £71,673 | £71,673 | £71,673 | new | 1 |
| 17 (16) |  | Somers Town (2008) | £43,086 | £111,839 | £438,777 | -43% | 3 |
| 18 (17) |  | Man On Wire (2008) | £30,155 | £60,695 | £705,418 | -7% | 6 |
| 19 (19) |  | Miss Pettigrew Lives For a Day (2008) | £18,433 | £48,136 | £355,128 | -29% | 4 |
| 20 (18) |  | Angus, Thongs and Perfect Snogging (2008) | £17,783 | £43,505 | £5,404,922 | -39% | 7 |
| 21 (new) | | Hijack (2008) | £14,960 | £14,960 | £14,960 | new | 1 |
| 22 (27) |  | The Edge of Love (2008) | £5,559 | £32,057 | £1,464,236 | 9% | 11 |
| 23 (26) |  | The Chronicles of Narnia: Prince Caspian (2008) | £4,167 | £7,956 | £11,611,495 | -30% | 11 |
| 24 (25) | | Angel (2008) | £3,694 | £8,428 | £18,867 | -65% | 2 |
| 25 (31) |  | Savage Grace (2007) | £1,559 | £4,399 | £171,293 | -12% | 9 |
| 26 (29) | | Before the Rains (2008) | £722 | £3,116 | £69,760 | -68% | 7 |
| 27 (33) |  | Cass (2008) | £672 | £999 | £133,896 | -17% | 6 |