As of April 2015, Hugh Bonneville, Elizabeth McGovern, Laura Carmichael and Michelle Dockery have starred in every season of “Downton Abbey” as members of the Crawley family. During that time, Jim Carter, Brendan Coyle, Joanne Froggatt and Phyllis Logan have starred as the family’s household staff.
Hugh Bonneville and Elizabeth McGovern portray the heads of the Crawley family, Robert and Cora Crawley, the Earl and Countess of Grantham. Laura Carmichael, who stars as Lady Edith, and Michelle Dockery, who stars as Lady Mary, portray Robert and Cora's daughters. Jessica Brown Findlay played their sister, Lady Sybil, and Allen Leech played Sybil's husband, Tom Branson. Maggie Smith plays Robert Crawley’s mother, the Dowager Countess of Grantham. Penelope Wilton stars as Isobel Crawley, the mother of Lady Mary’s late husband and cousin, Matthew Crawley, portrayed by Dan Stevens.
Jim Carter stars as Mr. Carson, who along with Phyllis Logan as Mrs. Hughes, portrays the head of household staff throughout the series. Joanne Froggatt and Brendan Coyle star as Anna and Mr. John Bates, who also star in the entire show. Thomas Barrow is a footman and ever-present antagonist portrayed by Rob James-Collier. Sophie McShera and Lesley Nicol play assistant cook Daisy and head cook Mrs. Patmore.
Actors with roles outside the Crawley household include David Robb, who protrays Dr. Clarkson; Jeremy Swift, who portrays Spratt; and Samantha Bond as Lady Rosamund.