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
Chimes at Midnight
Murder at the Gallop
Murder She Said
A Countess from Hong Kong
Murder Ahoy
Murder Most Foul
The V.I.P.s
Blithe Spirit
The Magic Box
The Importance of Being Earnest
The Alphabet Murders
Passport to Pimlico
Mad About Men
The Mouse on the Moon
Miranda
I'm All Right Jack
Big Fella
The Runaway Bus
An Alligator Named Daisy
The Happiest Days of Your Life
Miss Robin Hood
On the Double
Dusty Ermine
The Smallest Show on Earth
While the Sun Shines
Innocents in Paris
Aunt Clara
Arabella