Marianne Stone (Londres, 23 d’agost de 1922 - Londres, 21 de desembre de 2009) va ser una actriu de personatges anglesos. Va actuar en pel·lícules des de principis de la dècada de 1940 fins a finals de la dècada de 1980, normalment interpretant papers de classe treballadora.

The accomplished character actress Marianne Stone had the distinction of being the most prolific actress in the UK, appearing in over 200 films, an achievement that earned her a place in the latest Guinness Book of World Records as "the actress with the most screen credits". She has also been hailed in the book English Gothic: A Century of Horror Cinema for her contribution to the horror movies that flourished in the Sixties, but most of her screen roles were as working-class characters. In two of her earliest films she was respectively a shop assistant in When the Bough Breaks (1947), and a sluggish waitress in Brighton Rock (1947).