Biography
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.
Known For

Murder She Said
Miss Jane Marple

A Countess from Hong Kong
Miss Gaulswallow

Murder Ahoy
Miss Jane Marple

Passport to Pimlico
Professor Hatton-Jones

Murder at the Gallop
Miss Jane Marple

Murder Most Foul
Miss Jane Marple

The Importance of Being E...
Miss Prism

Chimes at Midnight
Mistress Quickly

Blithe Spirit
Madame Arcati

The Alphabet Murders
Miss Jane Marple (uncredited)