Filmography
- 1951: Sara Crewe .... Winnie (4 episodes, 1951)
- 1954: BBC Sunday-Night Theatre .... Adriana (1 episode, 1954)
- 1955: Moby Dick—Rehearsed (TV) .... A Young Actress/Pip
- 1956: Moby Dick (uncredited) .... Starbuck's Wife
- 1957: Sword of Freedom .... Lisa Giocondo (1 episode, 1957)
- 1957: Time Without Pity .... Agnes Cole
- 1959: The School for Scandal (TV) .... Lady Teazle
- 1960: The Entertainer .... Jean Rice
- 1963: Uncle Vanya .... Sonya
- 1969: ITV Saturday Night Theatre .... Viola (1 episode, 1969)
- 1970: ITV Playhouse .... Lisa (1 episode, 1970)
- 1970: Three Sisters .... Masha
- 1973: The Merchant of Venice (TV) .... Portia
- 1977: Equus .... Dora Strang
- 1978: Daphne Laureola (TV) .... Lady Pitts
- 1978: Saturday, Sunday, Monday (TV) .... Rosa
- 1980: The Diary of Anne Frank (TV) .... Mrs. Frank
- 1982: Brimstone & Treacle .... Norma Bates
- 1982: All for Love .... Edith (1 episode, 1982)
- 1982: Britannia Hospital .... Phyllis Grimshaw
- 1983: Wagner .... Mrs. Taylor (1 episode, 1983)
- 1985: Revolution .... Mrs. McConnahay
- 1986: The Importance of Being Earnest (TV) .... Lady Bracknell
- 1987: Theatre Night .... Meg Bowles (1 episode, 1987)
- 1988: Drowning by Numbers .... Cissie Colpitts 1
- 1988: The Dressmaker .... Nellie
- 1989: And a Nightingale Sang (TV) .... Mam
- 1990: Avalon .... Eva Krichinsky
- 1990: I Love You to Death .... Nadja, Rosalie's Mother
- 1990: Sophie
- 1991: The House of Bernarda Alba (TV) .... La Poncia
- 1992: Stalin (TV) .... Olga
- 1992: Driving Miss Daisy (TV) .... Daisy Werthan
- 1992: Enchanted April .... Mrs. Fisher
- 1993: Dennis the Menace .... Mrs. Martha Wilson
- 1993: Last Action Hero .... Teacher
- 1993: Screen Two .... Mrs. Monro (1 episode, 1993)
- 1994: The Return of the Native (TV) .... Mrs. Yeobright
- 1994: A Pin for the Butterfly .... Grandma
- 1994: A Place for Annie (TV) .... Dorothy
- 1994: On Promised Land (TV) .... Mrs. Appletree
- 1994: Widows' Peak .... Mrs. Doyle-Counihan
- 1995: The Scarlet Letter .... Harriet Hibbons
- 1995: A Pyromaniac's Love Story .... Mrs. Linzer
- 1995: Hotel Sorrento .... Marge Morrisey
- 1996: 101 Dalmatians .... Nanny
- 1996: Surviving Picasso .... Françoise's Grandmother
- 1996: Mr. Wrong .... Mrs. Crawford
- 1996: Jane Eyre .... Mrs. Fairfax
- 1997: The Assistant .... Mrs. Ida Bober
- 1998: Encore! Encore! .... Marie Pinoni (12 episodes, 1998–1999)
- 1998: Aldrich Ames: Traitor Within (TV) .... Jeanne Vertefeuille
- 1998: This Could Be the Last Time (TV) .... Rosemary
- 1998: Dance with Me .... Bea Johnson
- 1999: Tom's Midnight Garden .... Mrs. Bartholomew
- 1999: Tea with Mussolini .... Mary Wallace
- 2000: Frankie & Hazel (TV) .... Phoebe Harkness
- 2000: Dinosaur (voice) .... Baylene the Brachiosaurus
- 2001: Bailey's Mistake (TV) .... Aunt Angie
- 2001: Back to the Secret Garden .... Martha Sowerby
- 2001: Scrooge and Marley (TV) .... Narrator
- 2002: Global Heresy .... Lady Foxley
- 2002: Callas Forever .... Sarah Keller
- 2003: Bringing Down the House .... Virginia Arness
- 2003: I Am David .... Sophie
- 2004: George and the Dragon .... Mother Superior
- 2005: Mrs. Palfrey at the Claremont .... Mrs. Palfrey
- 2006: Goose on the Loose .... Beatrice Fairfield
- 2006: Curious George (voice) .... Ms. Plushbottom
- 2008: The Spiderwick Chronicles .... Aunt Lucinda Spiderwick
- 2008: Brontë
- 2008: In the Shadow of Wings
- 2010: Knife Edge .... Marjorie
Read more about this topic: Joan Plowright