selected filmography
| Year | Title | Role | Other notes |
| 1984 | Another Country | Tommy Judd | |
| 1987 | A Month in the Country | Tom Birkin | |
| 1988 | Apartment Zero | Adrian LeDuc | |
| 1989 | Valmont | Valmont | |
| 1993 | The Hour of the Pig | Richard Courtois | aka The Advocate |
| 1995 | Pride and Prejudice | Mr. Fitzwilliam Darcy | television mini-series |
| 1995 | Circle of Friends | Simon Westward | |
| 1996 | The English Patient | Geoffrey Clifton | |
| 1997 | Fever Pitch | Paul Ashworth | |
| 1997 | A Thousand Acres | Jess Clarke | |
| 1998 | Shakespeare in Love | Lord Wessex | |
| 1999 | My Life So Far | Edward Pettigrew | |
| 2000 | Relative Values | Peter Ingleton | |
| 2001 | Bridget Jones's Diary | Mark Darcy | |
| 2001 | Conspiracy | Wilhelm Stuckart | |
| 2002 | The Importance of Being Earnest | Jack Worthing | |
| 2003 | Girl with a Pearl Earring | Johannes Vermeer | |
| 2003 | Hope Springs | Colin Ware | |
| 2003 | Love Actually | Jamie Bennett | |
| 2003 | What a Girl Wants | Henry Dashwood | |
| 2004 | Bridget Jones: The Edge of Reason | Mark Darcy | |
| 2004 | Trauma | Ben | |
| 2005 | Where the Truth Lies | Vince Collins | |
| 2005 | Nanny McPhee | Cedric Brown | |
| 2006 | The Last Legion | Aurelius | |
| 2007 | The Accidental Husband | Richard |
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