Penelope Wilton (b. 1946) is a common name in British Theatre for which she has been nominated for the Laurence Oliver Award several times. Furthermore, she is a known name for all her work in British Television as well, most recently as a consistent part of 'Downton Abbey' on ITV.
Shaun of the Dead
As Barbara
Visitation
Clockwise
As Pat Garden
The History Boys
As Mrs. Bibby
Iris
As Janet Stone
Calendar Girls
As Ruth
The French Lieutenant's Woman
As Sonia
Cry Freedom
As Wendy Woods
Blame It on the Bellboy
As Patricia Fulford
Joseph Andrews
As Mrs. Wilton
Alice Through the Looking Glass
As White Queen
Carrington
As Lady Ottoline Morrell
The Best Exotic Marigold Hotel
As Jean Ainslie
Laughterhouse
As Alice Singleton
Tom's Midnight Garden
As Aunt Melbourne
Rockaby
As Old Woman
Brexit Shorts: The End
As Helen
The Girl
As Peggy Robertson
Landscape
As Beth
Belle
As Lady Mary Murray
Victoria & Albert
As Princess Mary Louise Victoria
The Secret Rapture
As Marion French
Match Point
As Eleanor Hewett
All the World's a Screen: Shakespeare on Film
As Narrator (voice)
The Deep Blue Sea
As Hester Collyer
King Lear
As Regan
Country
As Virginia Carlion
The Second Best Exotic Marigold Hotel
As Jean Ainslie
Judi Dench: Our National Treasure
As Self
Talking Heads 2
Victoria Wood with All the Trimmings
As Mrs. Cratchit
Falling
As Daisy Langrish
Celebration
As Julie
Downton Abbey 3
As Isobel Crawley
The BFG
As The Queen
Lucky Jim
As Celia Welch
The Whistle-Blower
As Heather Graham
Half Broken Things
As Jean
Margot
As B.Q.
National Theatre Live: 50 Years on Stage
As Delia
Harold Pinter: A Celebration
As Self
The Guernsey Literary & Potato Peel Pie Society
As Amelia Maugery
Zoo
As Denise Austin
Summerland
As Older Alice
Eternal Beauty
As Vivian
Downton Abbey
As Isobel Merton
Othello
As Desdemona
King Lear
As Regan
Operation Mincemeat
As Hester Leggett
Pride & Prejudice
As Mrs. Gardiner
Mrs. Warren's Profession
As Vivie Warren
Pasmore
As Helen
The Strange Case of Delfina Potocka
As Delfina / Paulina
Downton Abbey: A New Era
As Isobel Merton
The Unlikely Pilgrimage of Harold Fry
As Maureen Fry
Able's Will
As Journalist
The Tale of Beatrix Potter
As Beatrix Potter
Ever Decreasing Circles
Comedy Connections
C.A.T.S. Eyes
Five Days
As Barbara Poole
Bob & Rose
As Monica Gossage
The Return of the Borrowers
As Homily
The Passion
As Mary
BBC Television Shakespeare
Screaming
Downton Abbey
As Isobel Merton
Doctor Who
The Borrowers
As Homily
Performance
As Beth
South Riding
As Mrs Beddows
Talking Heads
As Rosemary
Brief Encounters
As Pauline
Murder Is Easy
As Miss Pinkerton
An Audience with...
As Self
Kavanagh Q.C.
As Barbara Watkins
The Norman Conquests
As Annie
Arena
As Self - Narrator
Wives and Daughters
As Mrs. Hamley
Dead Hot
As Francine
After Life
As Anne
Play for Today
As Virginia Carlion
The Tale of Beatrix Potter
As Beatrix Potter