| # | Weekend End Date | Film | Box office | Openings |
|---|
| 1 | January 5, 2003 | The Lord of the Rings: The Two Towers | £5,774,170 | Star Trek: Nemesis (#2), City of God (#6), Spider (#11) |
| 2 | January 12, 2003 | £3,728,876 | Gangs of New York (#2), The Tuxedo (#3), The Good Girl (#9), City by the Sea (#12) |
| 3 | January 19, 2003 | 8 Mile | £4,440,334 | The Transporter (#9), Dil Ka Rishta (#12), The Master of Disguise (#14) |
| 4 | January 26, 2003 | £2,514,467 | I Spy (#5), Ghost Ship (#6), About Schmidt (#7), The Pianist (#10) |
| 5 | February 2, 2003 | Catch Me If You Can | £3,720,957 | The Banger Sisters (#11) |
| 6 | February 9, 2003 | Two Weeks Notice | £2,636,050 | Final Destination 2 (#3), The Wild Thornberrys (#4), Punch-Drunk Love (#13) |
| 7 | February 16, 2003 | £2,189,331 | Daredevil (#2), Treasure Planet (#5), The Hours (#8), Undercover Brother (#11) |
| 8 | February 23, 2003 | The Ring | £2,200,084 | |
| 9 | March 2, 2003 | £1,692,154 | Jackass: The Movie (#2), Analyze That (#6), Solaris (#12), Adaptation (#14) |
| 10 | March 9, 2003 | Maid in Manhattan | £2,424,584 | Far from Heaven (#7) |
| 11 | March 16, 2003 | £1,281,755 | The Life of David Gale (#2), Equilibrium (#4), Confessions of a Dangerous Mind (#6), Barbershop (#14) |
| 12 | March 23, 2003 | Just Married | £973,469 | National Security (#4), Evelyn (#6) |
| 13 | March 30, 2003 | The Recruit | £923,834 | The Core (#3), Cradle 2 the Grave (#5), The Rules of Attraction (#7) |
| 14 | April 6, 2003 | £770,014 | Shanghai Knights (#2), A Man Apart (#3), Blue Crush (#4) |
| 15 | April 13, 2003 | Johnny English | £3,435,342 | The Jungle Book 2 (#2), S Club Seeing Double (#5) |
| 16 | April 20, 2003 | £2,529,665 | Phone Booth (#2), How to Lose a Guy in 10 Days (#3), Bulletproof Monk (#5), Ghosts of the Abyss (#12) |
| 17 | April 27, 2003 | £2,279,100 | Dreamcatcher (#5), Welcome to Collinwood (#6), 25th Hour (#9) |
| 18 | May 4, 2003 | X2 | £7,037,861 | The Heart of Me (#12), Half Past Dead (#13) |
| 19 | May 11, 2003 | £3,079,985 | Old School (#2), Darkness Falls (#4), Hope Springs (#7), I Capture the Castle (#9) |
| 20 | May 18, 2003 | £2,115,011 | Kangaroo Jack (#2), The Actors (#9), Secretary (#10) |
| 21 | May 25, 2003 | The Matrix Reloaded | £12,165,276 | The Hot Chick (#6), Andaaz (#12) |
| 22 | June 1, 2003 | £3,783,905 | Bringing Down the House (#2), Ripley's Game (#5) |
| 23 | June 8, 2003 | £2,485,938 | Anger Management (#2), The Hunted (#4) |
| 24 | June 15, 2003 | £1,071,551 | |
| 25 | June 22, 2003 | 2 Fast 2 Furious | £2,747,875 | |
| 26 | June 29, 2003 | Bruce Almighty | £7,260,467 | |
| 27 | July 6, 2003 | Charlie's Angels: Full Throttle | £3,273,078 | |
| 28 | July 13, 2003 | £1,581,273 | |
| 29 | July 20, 2003 | Hulk | £3,529,440 | |
| 30 | July 27, 2003 | £1,384,426 | |
| 31 | August 3, 2003 | Terminator 3: Rise of the Machines | £6,080,369 | |
| 32 | August 10, 2003 | Pirates of the Caribbean: The Curse of the Black Pearl | £3,765,450 | |
| 33 | August 17, 2003 | American Wedding | £4,151,788 | |
| 34 | August 24, 2003 | £2,180,783 | |
| 35 | August 31, 2003 | Pirates of the Caribbean: The Curse of the Black Pearl | £2,037,014 | |
| 36 | September 7, 2003 | £1,542,745 | |
| 37 | September 14, 2003 | Calendar Girls | £1,762,505 | |
| 38 | September 21, 2003 | The Italian Job | £2,294,027 | |
| 39 | September 28, 2003 | Calendar Girls | £1,761,985 | |
| 40 | October 5, 2003 | Bad Boys II | £3,175,258 | |
| 41 | October 12, 2003 | Finding Nemo † | £7,381,962 | |
| 42 | October 19, 2003 | £5,923,138 | |
| 43 | October 26, 2003 | £3,887,996 | |
| 44 | November 2, 2003 | £3,393,575 | |
| 45 | November 9, 2003 | The Matrix Revolutions | £8,712,350 | |
| 46 | November 16, 2003 | £2,575,595 | |
| 47 | November 23, 2003 | Love Actually | £6,657,479 | |
| 48 | November 30, 2003 | £4,660,595 | |
| 49 | December 7, 2003 | £3,202,417 | |
| 50 | December 14, 2003 | £2,273,706 | |
| 51 | December 21, 2003 | The Lord of the Rings: The Return of the King | £15,021,761 | |
| 52 | December 28, 2003 | £7,149,427 | |
|
