Margaret Rutherford
Dame Margaret Taylor Rutherford DBE (11 May 1892 – 22 May 1972) was an English character actress, who first came to prominence following World War II in the film adaptations of Noel Coward's Blithe Spirit, and Oscar Wilde's The Importance of Being Earnest. She is best-known for her 1960s performances as Miss Marple in several films based loosely on Agatha Christie's novels. Description above from the Wikipedia article Margaret Rutherford, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Filmography
The Merv Griffin Show
Zero One
Big Fella
Arabella
Chimes at Midnight
A Countess from Hong Kong
I'm All Right Jack
Miss Robin Hood
Murder She Said
The V.I.P.s
Curtain Up
Meet Me at Dawn
Murder Ahoy
The Importance of Being Earnest
Dusty Ermine
Innocents in Paris
Beauty and the Barge
Passport to Pimlico
Yellow Canary
Murder at the Gallop
Mad About Men
Aunt Clara
Blithe Spirit
Miranda
The Alphabet Murders
Murder Most Foul
The Happiest Days of Your Life
The Smallest Show on Earth
The Magic Box
The Mouse on the Moon