Glenn Close as Albert Nobbs

Mia Wasikowska as Helen Dawes

Aaron Taylor-Johnson as Joe Mackins

Janet McTeer as Hubert Page

Pauline Collins as Margaret Baker

Brenda Fricker as Polly

Jonathan Rhys Meyers as Viscount Yarrell

Brendan Gleeson as Dr. Holloran

Maria Doyle Kennedy as Mary

Antonia Campbell-Hughes as Emmy

Mark Williams as Sean Casey

James Greene as Patrick

Bronagh Gallagher as Cathleen

John Light as Mr. Smythe-Willard

Serena Brabazon as Mrs. Moore

Michael McElhatton as Mr. Moore

Dolores Mullally as Milady

Bonnie McCormack as Miss Shaw

Phyllida Law as Mrs. Cavendish

Kenneth Collard as Monsieur Pigot

Judy Donovan as Madame Pigot

Phoebe Waller-Bridge as Viscountess Yarrell

Emerald Fennell as Mrs. Smythe-Willard

Daniel Costello as Mr. Sweeney

Angeline Ball as Mrs. Gilligan

Philip O'Sullivan as Mr. Gilligan

Katie Long as Young Kitchen Maid

Katie O'Brien as Older Kitchen Maid

Mark Doherty as Porter

Rhys Burke as George Moore

Lauren Kinsella as Milly Moore

Katie Ann McDonough as Laundry Maid

Kathleen Warner Yeates as Laundry Maid

Cate MacGabhan as Laundry Maid

Antoinette Healy as Woman on Landau

Annie Starke as Chocolate Shop Waitress

Cathy White as Nanny

Malcolm Blacow as Health Official

Lily Melcher as Country Girl

Lucie Melcher as Country Girl

Raul Riva as Baby

Juno as Polly's Dog

Anna Elizabeth McGrath as Laundry Maid (uncredited)