Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Actor | Pride & Prejudice | 2005 | Mrs. Gardiner |
| Actor | Downton Abbey | Isobel Crawley | |
| Actor | After Life | Anne | |
| Actor | Shaun of the Dead | 2004 | Barbara |
| Actor | De GVR | 2016 | The Queen |
| Actor | Downtown Abbey | 2019 | Isobel Grey, Baroness Merton |
| Actor | Downton Abbey: A New Era | 2022 | Isobel Crawley |
| Actor | The Guernsey Literary Society | 2018 | Amelia Maugery |
| Actor | Match Point | 2005 | Eleanor Hewett |
| Actor | Operation Mincemeat | 2022 | Hester Leggett |
| Actor | Belle | 2013 | Lady Mary Murray |
| Actor | Summerland | 2020 | Alice (Older) |
| Actor | The Best Exotic Marigold Hotel | 2011 | Jean Ainslie |
| Actor | The Second Best Exotic Marigold Hotel | 2015 | Jean Ainslie |
| Actor | Five Days | Barbara Poole | |
| Actor | Moord is makkelijk | Miss Pinkerton | |
| Actor | Brief Encounters | Pauline | |
| Actor | Calendar Girls | 2003 | Ruth |
| Actor | Dead Hot | Francine | |
| Actor | The Unlikely Pilgrimage of Harold Fry | 2023 | Maureen |
| Actor | The French Lieutenant's Woman | 1981 | Sonia |
| Actor | Zoo | 2018 | Denise Austin |
| Actor | The Passion | Mary | |
| Actor | Cry Freedom | 1987 | Wendy Woods |
| Actor | The History Boys | 2006 | Mrs. Bibby |
| Actor | Iris | 2001 | Janet Stone |
| Actor | Downton Abbey: The Grand Finale | 2025 | Isobel "Lady Merton" Crawley |
| Actor | Alice Through the Looking Glass | 1998 | White Queen |
| Actor | Eternal Beauty | 2019 | |
| Actor | Bob and Rose | ||
| Actor | Clockwise | 1986 | Pat |
| Actor | The Borrowers | ||
| Actor | Carrington | 1995 | Lady Ottoline Morrell |
| Actor | The Girl | 2012 | Peggy Robertson |
| Actor | Tom's Midnight Garden | 1999 | Aunt Melbourne |
| Actor | Ever Decreasing Circles | Anne Bryce | |
| Actor | The Monocled Mutineer |