| Hugh Bonneville | Robert Crawley, Earl of Grantham |
| Laura Carmichael | Lady Edith Crawley |
| Jim Carter | Charles Carson |
| Brendan Coyle | John Bates |
| Michelle Dockery | Lady Mary Crawley |
| Kevin Doyle | Joseph Molesley |
| Joanne Froggatt | Anna Bates |
| Lily James | Lady Rose MacClare |
| Robert James-Collier | Thomas Barrow
(as Rob James-Collier) |
| Allen Leech | Tom Branson |
| Phyllis Logan | Mrs. Hughes |
| Elizabeth McGovern | Cora Crawley, Countess of Grantham |
| Sophie McShera | Daisy Mason |
| Matt Milne | Alfred Nugent |
| Lesley Nicol | Mrs. Patmore |
| David Robb | Dr. Clarkson |
| Maggie Smith | Violet Crawley, Dowager Countess of Grantham |
| Ed Speleers | Jimmy Kent |
| Cara Theobold | Ivy Stuart |
| Penelope Wilton | Isobel Crawley |
| Raquel Cassidy | Baxter |
| Joncie Elmore | John Pegg |
| Andrew Scarborough | Tim Drewe |
| Yves Aubert | Arsene Avignon |
| Kieran Hodgson | First Student |
| Spencer Cowan | Second Student |
| Brendan Patricks | Evelyn Napier |
| Julie Eagleton | Mourner
(uncredited) |
| Deborah Wise | Rally Attendee
(uncredited) |