Mia Wasikowska
Helen Dawes
Aaron Taylor-Johnson
Joe Mackins
Pauline Collins
Margaret Baker
Jonathan Rhys Meyers
Viscount Yarrell
Brendan Gleeson
Dr. Holloran
Antonia Campbell-Hughes
Emmy
Bronagh Gallagher
Cathleen
John Light
Mr. Smythe-Willard
Serena Brabazon
Mrs. Moore
Michael McElhatton
Mr. Moore
Bonnie McCormack
Miss Shaw
Phyllida Law
Mrs. Cavendish
Kenneth Collard
Monsieur Pigot
Phoebe Waller-Bridge
Viscountess Yarrell
Emerald Fennell
Mrs. Smythe-Willard
Daniel Costello
Mr. Sweeney
Angeline Ball
Mrs. Gilligan
Philip O'Sullivan
Mr. Gilligan
Katie Long
Young Kitchen Maid
Katie O'Brien
Older Kitchen Maid
Lauren Kinsella
Milly Moore
Katie Ann McDonough
Laundry Maid
Kathleen Warner Yeates
Laundry Maid
Cate MacGabhan
Laundry Maid
Antoinette Healy
Woman on Landau
Annie Starke
Chocolate Shop Waitress
Malcolm Blacow
Health Official
Lucie Melcher
Country Girl
Anna Elizabeth McGrath
Laundry Maid (uncredited)